diff --git a/.github/workflows/.github.yml b/.github/workflows/.github.yml
new file mode 100644
index 00000000..87f8bcb2
--- /dev/null
+++ b/.github/workflows/.github.yml
@@ -0,0 +1,45 @@
+name: build
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        include:
+          - os: ubuntu-latest
+            cc: gcc
+            cxx: g++
+          - os: ubuntu-latest
+            cc: clang
+            cxx: clang++
+    env:
+      CC: ${{ matrix.cc }}
+      CXX: ${{ matrix.cxx }}
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+
+    - name: Get SDL2 headers
+      uses: actions/checkout@v2
+      with:
+        repository: libsdl-org/SDL
+        ref: release-2.0.9
+        path: SDL2
+    - name: Link SDL2 headers into system path
+      run: |
+        sudo ln -s "$GITHUB_WORKSPACE/SDL2/include" /usr/local/include/SDL2
+
+    - name: Install dependencies
+      if: startsWith(matrix.os, 'ubuntu')
+      run: |
+        sudo apt-get -y install gcc-multilib g++-multilib
+
+    - name: Build with xash3d-fwgs input
+      run: |
+        cmake -B build -S . -DCMAKE_EXE_LINKER_FLAGS="-Wl,--no-undefined" && cmake --build build --target all
+    - name: Build with goldsource input
+      run: |
+        cmake -B build-gs -S . -DCMAKE_EXE_LINKER_FLAGS="-Wl,--no-undefined" -DGOLDSOURCE_SUPPORT=ON && cmake --build build-gs --target all
+
diff --git a/README.md b/README.md
index fe9e883f..86c9c9c0 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# Half-Life SDK for Xash3D [![Build Status](https://travis-ci.org/FWGS/hlsdk-xash3d.svg)](https://travis-ci.org/FWGS/hlsdk-xash3d) [![Windows Build Status](https://ci.appveyor.com/api/projects/status/github/FWGS/hlsdk-xash3d?svg=true)](https://ci.appveyor.com/project/a1batross/hlsdk-xash3d)
+# Half-Life SDK for Xash3D [![Build Status](https://github.com/FWGS/hlsdk-xash3d/actions/workflows/.github.yml/badge.svg?branch=master)](https://github.com/FWGS/hlsdk-xash3d/actions/workflows/.github.yml) [![Windows Build Status](https://ci.appveyor.com/api/projects/status/github/FWGS/hlsdk-xash3d?svg=true)](https://ci.appveyor.com/project/a1batross/hlsdk-xash3d)
 
 Half-Life SDK for Xash3D & GoldSource with some fixes.
 
diff --git a/cl_dll/ev_hldm.cpp b/cl_dll/ev_hldm.cpp
index 0db780f7..a5011f33 100644
--- a/cl_dll/ev_hldm.cpp
+++ b/cl_dll/ev_hldm.cpp
@@ -1140,7 +1140,7 @@ enum crowbar_e
 	CROWBAR_ATTACK2MISS,
 	CROWBAR_ATTACK2HIT,
 	CROWBAR_ATTACK3MISS,
-#ifndef CROWBAR_IDLE_ANIM
+#if !CROWBAR_IDLE_ANIM
 	CROWBAR_ATTACK3HIT
 #else
 	CROWBAR_ATTACK3HIT,
diff --git a/cl_dll/in_camera.cpp b/cl_dll/in_camera.cpp
index 3b089577..ad5ec8bf 100644
--- a/cl_dll/in_camera.cpp
+++ b/cl_dll/in_camera.cpp
@@ -148,7 +148,7 @@ void DLLEXPORT CAM_Think( void )
 	float dist;
 	vec3_t camAngles;
 	float flSensitivity;
-#ifdef LATER
+#if LATER
 	int i;
 #endif
 	vec3_t viewangles;
@@ -168,7 +168,7 @@ void DLLEXPORT CAM_Think( void )
 
 	if( !cam_thirdperson )
 		return;
-#ifdef LATER
+#if LATER
 	if( cam_contain->value )
 	{
 		gEngfuncs.GetClientOrigin( origin );
@@ -315,7 +315,7 @@ void DLLEXPORT CAM_Think( void )
 		cam_old_mouse_y = cam_mouse.y * gHUD.GetSensitivity();
 		SetCursorPos( gEngfuncs.GetWindowCenterX(), gEngfuncs.GetWindowCenterY() );
 	}
-#ifdef LATER
+#if LATER
 	if( cam_contain->value )
 	{
 		// check new ideal
@@ -368,7 +368,7 @@ void DLLEXPORT CAM_Think( void )
 		else
 			camAngles[2] += ( cam_idealdist->value - camAngles[2] ) * 0.25f;
 	}
-#ifdef LATER
+#if LATER
 	if( cam_contain->value )
 	{
 		// Test new position
diff --git a/cl_dll/in_defs.h b/cl_dll/in_defs.h
index b4c51730..7221c356 100644
--- a/cl_dll/in_defs.h
+++ b/cl_dll/in_defs.h
@@ -16,7 +16,7 @@
 // fall over
 #define	ROLL	2 
 
-#ifdef _WIN32
+#if _WIN32
 #define HSPRITE HSPRITE_win32
 #include <windows.h>
 #undef HSPRITE
diff --git a/cl_dll/input_goldsource.cpp b/cl_dll/input_goldsource.cpp
index be85ee3a..8698a5d3 100644
--- a/cl_dll/input_goldsource.cpp
+++ b/cl_dll/input_goldsource.cpp
@@ -23,7 +23,7 @@
 #include "keydefs.h"
 #include "view.h"
 
-#ifndef _WIN32
+#if !_WIN32
 #define USE_SDL2
 #endif
 
@@ -114,7 +114,7 @@ static SDLFunction sdlFunctions[] = {
 };
 #endif
 
-#ifdef _WIN32
+#if _WIN32
 #include <process.h>
 #else
 typedef unsigned int DWORD;
@@ -149,14 +149,14 @@ extern cvar_t *cl_forwardspeed;
 extern cvar_t *cl_pitchspeed;
 extern cvar_t *cl_movespeedkey;
 
-#ifdef _WIN32
+#if _WIN32
 static double s_flRawInputUpdateTime = 0.0f;
 static bool m_bRawInput = false;
 static bool m_bMouseThread = false;
 bool isMouseRelative = false;
 #endif
 
-#ifdef _WIN32
+#if _WIN32
 #include "progdefs.h"
 extern globalvars_t *gpGlobals;
 #endif
@@ -184,7 +184,7 @@ static cvar_t *m_customaccel_max;
 //Mouse move is raised to this power before being scaled by scale factor
 static cvar_t *m_customaccel_exponent;
 
-#ifdef _WIN32
+#if _WIN32
 // if threaded mouse is enabled then the time to sleep between polls
 static cvar_t *m_mousethread_sleep;
 #endif
@@ -276,7 +276,7 @@ cvar_t  *joy_wwhack2;
 
 int joy_avail, joy_advancedinit, joy_haspov;
 
-#ifdef _WIN32
+#if _WIN32
 unsigned int s_hMouseThreadId = 0;
 HANDLE s_hMouseThread = 0;
 HANDLE s_hMouseQuitEvent = 0;
@@ -300,7 +300,7 @@ void Force_CenterView_f (void)
 	}
 }
 
-#ifdef _WIN32
+#if _WIN32
 
 LONG mouseThreadActive = 0;
 LONG mouseThreadCenterX = 0;
@@ -382,14 +382,14 @@ void IN_SetMouseMode(bool enable)
 
 	if(enable)
 	{
-#ifdef _WIN32
+#if _WIN32
 		if (mouseparmsvalid)
 			restore_spi = SystemParametersInfo (SPI_SETMOUSE, 0, newmouseparms, 0);
 
 		m_bRawInput = CVAR_GET_FLOAT( "m_rawinput" ) != 0;
 		if(m_bRawInput)
 		{
-#ifdef USE_SDL2
+#if USE_SDL2
 			safe_pfnSDL_SetRelativeMouseMode(SDL_TRUE);
 #endif
 			isMouseRelative = true;
@@ -402,10 +402,10 @@ void IN_SetMouseMode(bool enable)
 	}
 	else
 	{
-#ifdef _WIN32
+#if _WIN32
 		if(isMouseRelative)
 		{
-#ifdef USE_SDL2
+#if USE_SDL2
 			safe_pfnSDL_SetRelativeMouseMode(SDL_FALSE);
 #endif
 			isMouseRelative = false;
@@ -423,7 +423,7 @@ void IN_SetMouseMode(bool enable)
 
 void IN_SetVisibleMouse(bool visible)
 {
-#ifdef _WIN32
+#if _WIN32
 	bool lockEntered = MouseThread_ActiveLock_Enter();
 #endif
 
@@ -431,7 +431,7 @@ void IN_SetVisibleMouse(bool visible)
 
 	IN_SetMouseMode(!visible);
 
-#ifdef _WIN32
+#if _WIN32
 	UpdateMouseThreadActive();
 	if(lockEntered) MouseThread_ActiveLock_Exit();
 #endif
@@ -448,7 +448,7 @@ void GoldSourceInput::IN_ActivateMouse (void)
 {
 	if (mouseinitialized)
 	{
-#ifdef _WIN32
+#if _WIN32
 		bool lockEntered = MouseThread_ActiveLock_Enter();
 #endif
 
@@ -456,7 +456,7 @@ void GoldSourceInput::IN_ActivateMouse (void)
 
 		mouseactive = 1;
 
-#ifdef _WIN32
+#if _WIN32
 		UpdateMouseThreadActive();
 		if(lockEntered) MouseThread_ActiveLock_Exit();
 #endif
@@ -476,7 +476,7 @@ void GoldSourceInput::IN_DeactivateMouse (void)
 {
 	if (mouseinitialized)
 	{
-#ifdef _WIN32
+#if _WIN32
 		bool lockEntered = MouseThread_ActiveLock_Enter();
 #endif
 
@@ -484,7 +484,7 @@ void GoldSourceInput::IN_DeactivateMouse (void)
 
 		mouseactive = 0;
 
-#ifdef _WIN32
+#if _WIN32
 		UpdateMouseThreadActive();
 		if(lockEntered) MouseThread_ActiveLock_Exit();
 #endif
@@ -502,7 +502,7 @@ void GoldSourceInput::IN_StartupMouse (void)
 		return;
 
 	mouseinitialized = 1;
-#ifdef _WIN32
+#if _WIN32
 	mouseparmsvalid = SystemParametersInfo (SPI_GETMOUSE, 0, originalmouseparms, 0);
 
 	if (mouseparmsvalid)
@@ -537,7 +537,7 @@ void GoldSourceInput::IN_Shutdown (void)
 {
 	IN_DeactivateMouse ();
 
-#ifdef _WIN32
+#if _WIN32
 	if ( s_hMouseQuitEvent )
 	{
 		SetEvent( s_hMouseQuitEvent );
@@ -597,7 +597,7 @@ FIXME: Call through to engine?
 void IN_ResetMouse( void )
 {
 	// no work to do in SDL
-#ifdef _WIN32
+#if _WIN32
 	// reset only if mouse is active and not in visible mode:
 	if(mouseactive && !iVisibleMouse && gEngfuncs.GetWindowCenterX && gEngfuncs.GetWindowCenterY)
 	{
@@ -712,7 +712,7 @@ void GoldSourceInput::IN_GetMouseDelta( int *pOutX, int *pOutY)
 	if(active)
 	{
 		int deltaX, deltaY;
-#ifdef _WIN32
+#if _WIN32
 		if ( !m_bRawInput )
 		{
 			if ( m_bMouseThread )
@@ -746,7 +746,7 @@ void GoldSourceInput::IN_GetMouseDelta( int *pOutX, int *pOutY)
 #endif
 		}
 
-#ifdef _WIN32
+#if _WIN32
 		if ( !m_bRawInput )
 		{
 			if ( m_bMouseThread )
@@ -771,7 +771,7 @@ void GoldSourceInput::IN_GetMouseDelta( int *pOutX, int *pOutY)
 		my_accum = 0;
 
 		// reset mouse position if required, so there is room to move:
-#ifdef _WIN32
+#if _WIN32
 		// do not reset if mousethread would do it:
 		if ( m_bRawInput || !m_bMouseThread )
 #else
@@ -779,7 +779,7 @@ void GoldSourceInput::IN_GetMouseDelta( int *pOutX, int *pOutY)
 #endif
 			IN_ResetMouse();
 
-#ifdef _WIN32
+#if _WIN32
 		// update m_bRawInput occasionally:
 		if ( gpGlobals && gpGlobals->time - s_flRawInputUpdateTime > 1.0f )
 		{
@@ -791,14 +791,14 @@ void GoldSourceInput::IN_GetMouseDelta( int *pOutX, int *pOutY)
 
 			if(m_bRawInput && !isMouseRelative)
 			{
-#ifdef USE_SDL2
+#if USE_SDL2
 				safe_pfnSDL_SetRelativeMouseMode(SDL_TRUE);
 #endif
 				isMouseRelative = true;
 			}
 			else if(!m_bRawInput && isMouseRelative)
 			{
-#ifdef USE_SDL2
+#if USE_SDL2
 				safe_pfnSDL_SetRelativeMouseMode(SDL_FALSE);
 #endif
 				isMouseRelative = false;
@@ -928,7 +928,7 @@ void GoldSourceInput::IN_Accumulate (void)
 	{
 		if (mouseactive)
 		{
-#ifdef _WIN32
+#if _WIN32
 			if ( !m_bRawInput )
 			{
 				if ( !m_bMouseThread )
@@ -956,7 +956,7 @@ void GoldSourceInput::IN_Accumulate (void)
 			}
 
 			// force the mouse to the center, so there's room to move
-#ifdef _WIN32
+#if _WIN32
 			// do not reset if mousethread would do it:
 			if ( m_bRawInput || !m_bMouseThread )
 #else
@@ -1570,7 +1570,7 @@ void GoldSourceInput::IN_Init (void)
 	m_customaccel_max		= gEngfuncs.pfnRegisterVariable ( "m_customaccel_max", "0", FCVAR_ARCHIVE );
 	m_customaccel_exponent	= gEngfuncs.pfnRegisterVariable ( "m_customaccel_exponent", "1", FCVAR_ARCHIVE );
 
-#ifdef _WIN32
+#if _WIN32
 	m_bRawInput			 = CVAR_GET_FLOAT( "m_rawinput" ) != 0;
 	m_bMouseThread		  = gEngfuncs.CheckParm ("-mousethread", NULL ) != NULL;
 	m_mousethread_sleep	 = gEngfuncs.pfnRegisterVariable ( "m_mousethread_sleep", "1", FCVAR_ARCHIVE ); // default to less than 1000 Hz
@@ -1601,7 +1601,7 @@ void GoldSourceInput::IN_Init (void)
 #endif
 
 #ifdef USE_SDL2
-#ifdef __APPLE__
+#if __APPLE__
 #define SDL2_FULL_LIBNAME "libsdl2-2.0.0.dylib"
 #else
 #define SDL2_FULL_LIBNAME "libSDL2-2.0.so.0"
diff --git a/cl_dll/tf_defs.h b/cl_dll/tf_defs.h
index a9270f1e..ba7ae0f9 100644
--- a/cl_dll/tf_defs.h
+++ b/cl_dll/tf_defs.h
@@ -46,7 +46,7 @@
 // Debug Options
 //#define MAP_DEBUG                     // Debug for Map code. I suggest running in a hi-res
 										// mode and/or piping the output from the server to a file.
-#ifdef MAP_DEBUG
+#if MAP_DEBUG
 	#define MDEBUG(x) x
 #else
 	#define MDEBUG(x)
diff --git a/dlls/AI_BaseNPC_Schedule.cpp b/dlls/AI_BaseNPC_Schedule.cpp
index 468bb358..a6e4962b 100644
--- a/dlls/AI_BaseNPC_Schedule.cpp
+++ b/dlls/AI_BaseNPC_Schedule.cpp
@@ -181,7 +181,7 @@ BOOL CBaseMonster :: FScheduleValid ( void )
 
 	if ( HasConditions( m_pSchedule->iInterruptMask | bits_COND_SCHEDULE_DONE | bits_COND_TASK_FAILED ) )
 	{
-#ifdef DEBUG
+#if DEBUG
 		if ( HasConditions ( bits_COND_TASK_FAILED ) && m_failSchedule == SCHED_NONE )
 		{
 			// fail! Send a visual indicator.
diff --git a/dlls/apache.cpp b/dlls/apache.cpp
index e69d72e9..0844e2c4 100644
--- a/dlls/apache.cpp
+++ b/dlls/apache.cpp
@@ -12,7 +12,7 @@
 *   use or distribution of this code by or to any unlicensed person is illegal.
 *
 ****/
-#ifndef OEM_BUILD
+#if !OEM_BUILD
 
 #include "extdll.h"
 #include "util.h"
diff --git a/dlls/barnacle.cpp b/dlls/barnacle.cpp
index 8db34740..5298bb32 100644
--- a/dlls/barnacle.cpp
+++ b/dlls/barnacle.cpp
@@ -57,7 +57,7 @@ public:
 
 	// FIXME: need a custom barnacle model with non-generic hitgroup
 	// otherwise we can apply to damage to tongue instead of body
-#ifdef BARNACLE_FIX_VISIBILITY
+#if BARNACLE_FIX_VISIBILITY
 	void SetObjectCollisionBox( void )
 	{
 		pev->absmin = pev->origin + Vector( -16.0f, -16.0f, -m_flCachedLength );
@@ -160,7 +160,7 @@ void CBarnacle::BarnacleThink( void )
 	CBaseEntity *pTouchEnt;
 	CBaseMonster *pVictim;
 	float flLength;
-#ifdef BARNACLE_FIX_VISIBILITY
+#if BARNACLE_FIX_VISIBILITY
 	if( m_flCachedLength != ( m_flAltitude + m_flTongueAdj ) || ( pev->absmin.z != pev->origin.z + -m_flCachedLength ) )
 	{
 		// recalc collision box here to avoid barnacle disappears bug
diff --git a/dlls/bigmomma.cpp b/dlls/bigmomma.cpp
index 584a6737..62188740 100644
--- a/dlls/bigmomma.cpp
+++ b/dlls/bigmomma.cpp
@@ -12,7 +12,7 @@
 *   use or distribution of this code by or to any unlicensed person is illegal.
 *
 ****/
-#if !defined( OEM_BUILD ) && !defined( HLDEMO_BUILD )
+#if !OEM_BUILD && !HLDEMO_BUILD
 
 //=========================================================
 // monster template
diff --git a/dlls/cbase.cpp b/dlls/cbase.cpp
index 7f1f204a..cfc78697 100644
--- a/dlls/cbase.cpp
+++ b/dlls/cbase.cpp
@@ -98,7 +98,7 @@ static DLL_FUNCTIONS gFunctionTable =
 
 static void SetObjectCollisionBox( entvars_t *pev );
 
-#ifndef _WIN32
+#if !_WIN32
 extern "C" {
 #endif
 int GetEntityAPI( DLL_FUNCTIONS *pFunctionTable, int interfaceVersion )
@@ -125,7 +125,7 @@ int GetEntityAPI2( DLL_FUNCTIONS *pFunctionTable, int *interfaceVersion )
 	return TRUE;
 }
 
-#ifndef _WIN32
+#if !_WIN32
 }
 #endif
 
diff --git a/dlls/cbase.h b/dlls/cbase.h
index ba1c0464..71f0fc26 100644
--- a/dlls/cbase.h
+++ b/dlls/cbase.h
@@ -279,7 +279,7 @@ public:
 	}
 
 	// Ugly code to lookup all functions to make sure they are exported when set.
-#ifdef _DEBUG
+#if _DEBUG
 	void FunctionCheck( void *pFunction, char *name ) 
 	{ 
 		if( pFunction && !NAME_FOR_FUNCTION( pFunction ) )
@@ -356,7 +356,7 @@ public:
 // Normally it's illegal to cast a pointer to a member function of a derived class to a pointer to a 
 // member function of a base class.  static_cast is a sleezy way around that problem.
 
-#ifdef _DEBUG
+#if _DEBUG
 
 #define SetThink( a ) ThinkSet( static_cast <void (CBaseEntity::*)(void)> (a), #a )
 #define SetTouch( a ) TouchSet( static_cast <void (CBaseEntity::*)(CBaseEntity *)> (a), #a )
diff --git a/dlls/client.cpp b/dlls/client.cpp
index cade437a..52c9644d 100644
--- a/dlls/client.cpp
+++ b/dlls/client.cpp
@@ -208,7 +208,7 @@ void ClientPutInServer( edict_t *pEntity )
 	pPlayer->pev->iuser2 = 0;
 }
 
-#ifndef NO_VOICEGAMEMGR
+#if !NO_VOICEGAMEMGR
 #include "voice_gamemgr.h"
 extern CVoiceGameMgr g_VoiceGameMgr;
 #endif
@@ -404,7 +404,7 @@ void Host_Say( edict_t *pEntity, int teamonly )
 
 		if( !( client->IsNetClient() ) )	// Not a client ? (should never be true)
 			continue;
-#ifndef NO_VOICEGAMEMGR
+#if !NO_VOICEGAMEMGR
 		// can the receiver hear the sender? or has he muted him?
 		if( g_VoiceGameMgr.PlayerHasBlockedPlayer( client, player ) )
 			continue;
@@ -1626,7 +1626,7 @@ void RegisterEncoders( void )
 
 int GetWeaponData( struct edict_s *player, struct weapon_data_s *info )
 {
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 	int i;
 	weapon_data_t *item;
 	entvars_t *pev = &player->v;
@@ -1755,7 +1755,7 @@ void UpdateClientData( const struct edict_s *ent, int sendweapons, struct client
 		cd->iuser1		= pev->iuser1;
 		cd->iuser2		= pev->iuser2;
 	}
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 	if( sendweapons )
 	{
 		if( pl )
diff --git a/dlls/controller.cpp b/dlls/controller.cpp
index 1f851766..20c9a502 100644
--- a/dlls/controller.cpp
+++ b/dlls/controller.cpp
@@ -12,7 +12,7 @@
 *   use or distribution of this code by or to any unlicensed person is illegal.
 *
 ****/
-#if !defined( OEM_BUILD ) && !defined( HLDEMO_BUILD )
+#if !OEM_BUILD && !HLDEMO_BUILD
 
 //=========================================================
 // CONTROLLER
diff --git a/dlls/crossbow.cpp b/dlls/crossbow.cpp
index e6eea1c5..c7b04f77 100644
--- a/dlls/crossbow.cpp
+++ b/dlls/crossbow.cpp
@@ -12,7 +12,7 @@
 *   without written permission from Valve LLC.
 *
 ****/
-#if !defined( OEM_BUILD ) && !defined( HLDEMO_BUILD )
+#if !OEM_BUILD && !HLDEMO_BUILD
 
 #include "extdll.h"
 #include "util.h"
@@ -23,7 +23,7 @@
 #include "player.h"
 #include "gamerules.h"
 
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 #define BOLT_AIR_VELOCITY	2000
 #define BOLT_WATER_VELOCITY	1000
 
@@ -338,7 +338,7 @@ void CCrossbow::Holster( int skiplocal /* = 0 */ )
 
 void CCrossbow::PrimaryAttack( void )
 {
-#ifdef CLIENT_DLL
+#if CLIENT_DLL
 	if( m_fInZoom && bIsMultiplayer() )
 #else
 	if( m_fInZoom && g_pGameRules->IsMultiplayer() )
@@ -368,7 +368,7 @@ void CCrossbow::FireSniperBolt()
 	m_iClip--;
 
 	int flags;
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 	flags = FEV_NOTHOST;
 #else
 	flags = 0;
@@ -386,7 +386,7 @@ void CCrossbow::FireSniperBolt()
 
 	UTIL_TraceLine( vecSrc, vecSrc + vecDir * 8192, dont_ignore_monsters, m_pPlayer->edict(), &tr );
 
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 	if( tr.pHit->v.takedamage )
 	{
 		ClearMultiDamage();
@@ -411,7 +411,7 @@ void CCrossbow::FireBolt()
 	m_iClip--;
 
 	int flags;
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 	flags = FEV_NOTHOST;
 #else
 	flags = 0;
@@ -427,7 +427,7 @@ void CCrossbow::FireBolt()
 
 	anglesAim.x	= -anglesAim.x;
 
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 	Vector vecSrc	= m_pPlayer->GetGunPosition() - gpGlobals->v_up * 2.0f;
 	Vector vecDir	= gpGlobals->v_forward;
 
diff --git a/dlls/crowbar.cpp b/dlls/crowbar.cpp
index df702f76..f1b2393b 100644
--- a/dlls/crowbar.cpp
+++ b/dlls/crowbar.cpp
@@ -37,7 +37,7 @@ enum crowbar_e
 	CROWBAR_ATTACK2MISS,
 	CROWBAR_ATTACK2HIT,
 	CROWBAR_ATTACK3MISS,
-#ifndef CROWBAR_IDLE_ANIM	
+#if !CROWBAR_IDLE_ANIM	
 	CROWBAR_ATTACK3HIT
 #else
 	CROWBAR_ATTACK3HIT,
@@ -157,7 +157,7 @@ void CCrowbar::PrimaryAttack()
 {
 	if( !Swing( 1 ) )
 	{
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 		SetThink( &CCrowbar::SwingAgain );
 		pev->nextthink = gpGlobals->time + 0.1f;
 #endif
@@ -186,7 +186,7 @@ int CCrowbar::Swing( int fFirst )
 
 	UTIL_TraceLine( vecSrc, vecEnd, dont_ignore_monsters, ENT( m_pPlayer->pev ), &tr );
 
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 	if( tr.flFraction >= 1.0f )
 	{
 		UTIL_TraceHull( vecSrc, vecEnd, dont_ignore_monsters, head_hull, ENT( m_pPlayer->pev ), &tr );
@@ -214,7 +214,7 @@ int CCrowbar::Swing( int fFirst )
 		{
 			// miss
 			m_flNextPrimaryAttack = GetNextAttackDelay( 0.5 );
-#ifdef CROWBAR_IDLE_ANIM
+#if CROWBAR_IDLE_ANIM
 			m_flTimeWeaponIdle = UTIL_WeaponTimeBase() + UTIL_SharedRandomFloat( m_pPlayer->random_seed, 10, 15 );
 #endif
 			// player "shoot" animation
@@ -239,7 +239,7 @@ int CCrowbar::Swing( int fFirst )
 		// player "shoot" animation
 		m_pPlayer->SetAnimation( PLAYER_ATTACK1 );
 
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 		// hit
 		fDidHit = TRUE;
 		CBaseEntity *pEntity = CBaseEntity::Instance( tr.pHit );
@@ -254,7 +254,7 @@ int CCrowbar::Swing( int fFirst )
 			// If building with the clientside weapon prediction system,
 			// UTIL_WeaponTimeBase() is always 0 and m_flNextPrimaryAttack is >= -1.0f, thus making
 			// m_flNextPrimaryAttack + 1 < UTIL_WeaponTimeBase() always evaluate to false.
-#ifdef CLIENT_WEAPONS
+#if CLIENT_WEAPONS
 			if( ( m_flNextPrimaryAttack + 1.0f == UTIL_WeaponTimeBase() ) || g_pGameRules->IsMultiplayer() )
 #else
 			if( ( m_flNextPrimaryAttack + 1.0f < UTIL_WeaponTimeBase() ) || g_pGameRules->IsMultiplayer() )
@@ -290,7 +290,7 @@ int CCrowbar::Swing( int fFirst )
 
 				if( !pEntity->IsAlive() )
 				{
-#ifdef CROWBAR_FIX_RAPID_CROWBAR
+#if CROWBAR_FIX_RAPID_CROWBAR
 					m_flNextPrimaryAttack = GetNextAttackDelay(0.25);
 #endif
 					return TRUE;
@@ -343,13 +343,13 @@ int CCrowbar::Swing( int fFirst )
 		m_flNextPrimaryAttack = GetNextAttackDelay( 0.25f );
 #endif
 	}
-#ifdef CROWBAR_IDLE_ANIM
+#if CROWBAR_IDLE_ANIM
 	m_flTimeWeaponIdle = UTIL_WeaponTimeBase() + UTIL_SharedRandomFloat( m_pPlayer->random_seed, 10, 15 );
 #endif
 	return fDidHit;
 }
 
-#ifdef CROWBAR_IDLE_ANIM
+#if CROWBAR_IDLE_ANIM
 void CCrowbar::WeaponIdle( void )
 {
 	if( m_flTimeWeaponIdle < UTIL_WeaponTimeBase() )
diff --git a/dlls/doors.cpp b/dlls/doors.cpp
index 235669af..1f5b4b06 100644
--- a/dlls/doors.cpp
+++ b/dlls/doors.cpp
@@ -685,7 +685,7 @@ void CBaseDoor::DoorGoDown( void )
 	if( !FBitSet( pev->spawnflags, SF_DOOR_SILENT ) )
 		if( m_toggle_state != TS_GOING_UP && m_toggle_state != TS_GOING_DOWN )
 			EMIT_SOUND( ENT( pev ), CHAN_STATIC, STRING( pev->noiseMoving ), 1.0f, ATTN_NORM );	
-#ifdef DOOR_ASSERT
+#if DOOR_ASSERT
 	ASSERT( m_toggle_state == TS_AT_TOP );
 #endif // DOOR_ASSERT
 	m_toggle_state = TS_GOING_DOWN;
diff --git a/dlls/egon.cpp b/dlls/egon.cpp
index a52e58ab..efbe4449 100644
--- a/dlls/egon.cpp
+++ b/dlls/egon.cpp
@@ -12,7 +12,7 @@
 *   without written permission from Valve LLC.
 *
 ****/
-#if !defined( OEM_BUILD ) && !defined( HLDEMO_BUILD )
+#if !OEM_BUILD && !HLDEMO_BUILD
 
 #include "extdll.h"
 #include "util.h"
@@ -178,7 +178,7 @@ void CEgon::Attack( void )
 	Vector vecSrc = m_pPlayer->GetGunPosition();
 
 	int flags;
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 	flags = FEV_NOTHOST;
 #else
 	flags = 0;
@@ -252,7 +252,7 @@ void CEgon::Fire( const Vector &vecOrigSrc, const Vector &vecDir )
 	if( tr.fAllSolid )
 		return;
 
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 	CBaseEntity *pEntity = CBaseEntity::Instance( tr.pHit );
 
 	if( pEntity == NULL )
@@ -275,7 +275,7 @@ void CEgon::Fire( const Vector &vecOrigSrc, const Vector &vecDir )
 	switch( m_fireMode )
 	{
 	case FIRE_NARROW:
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 		if( pev->dmgtime < gpGlobals->time )
 		{
 			// Narrow mode only does damage to the entity it hits
@@ -311,7 +311,7 @@ void CEgon::Fire( const Vector &vecOrigSrc, const Vector &vecDir )
 		timedist = ( pev->dmgtime - gpGlobals->time ) / GetPulseInterval();
 		break;
 	case FIRE_WIDE:
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 		if( pev->dmgtime < gpGlobals->time )
 		{
 			// wide mode does damage to the ent, and radius damage
@@ -373,7 +373,7 @@ void CEgon::Fire( const Vector &vecOrigSrc, const Vector &vecDir )
 
 void CEgon::UpdateEffect( const Vector &startPoint, const Vector &endPoint, float timeBlend )
 {
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 	if( !m_pBeam )
 	{
 		CreateEffect();
@@ -399,7 +399,7 @@ void CEgon::UpdateEffect( const Vector &startPoint, const Vector &endPoint, floa
 
 void CEgon::CreateEffect( void )
 {
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 	DestroyEffect();
 
 	m_pBeam = CBeam::BeamCreate( EGON_BEAM_SPRITE, 40 );
@@ -445,7 +445,7 @@ void CEgon::CreateEffect( void )
 
 void CEgon::DestroyEffect( void )
 {
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 	if( m_pBeam )
 	{
 		UTIL_Remove( m_pBeam );
diff --git a/dlls/exportdef.h b/dlls/exportdef.h
index 363d8d12..bc3c6371 100644
--- a/dlls/exportdef.h
+++ b/dlls/exportdef.h
@@ -2,7 +2,7 @@
 #ifndef EXPORTDEF_H
 #define EXPORTDEF_H
 #if defined _WIN32 || defined __CYGWIN__
-	#ifdef __GNUC__
+	#if __GNUC__
 		#define EXPORT __attribute__ ((dllexport))
 	#else
 		#define EXPORT __declspec(dllexport) // Note: actually gcc seems to also supports this syntax.
diff --git a/dlls/extdll.h b/dlls/extdll.h
index d8fdb41f..0c35fe3a 100644
--- a/dlls/extdll.h
+++ b/dlls/extdll.h
@@ -21,12 +21,12 @@
 //
 
 // Allow "DEBUG" in addition to default "_DEBUG"
-#ifdef _DEBUG
+#if _DEBUG
 #define DEBUG 1
 #endif
 
 // Silence certain warnings
-#ifdef _MSC_VER
+#if _MSC_VER
 #pragma warning(disable : 4244)		// int or float down-conversion
 #pragma warning(disable : 4305)		// int or float data truncation
 #pragma warning(disable : 4201)		// nameless struct/union
@@ -35,7 +35,7 @@
 #endif
 
 // Prevent tons of unused windows definitions
-#ifdef _WIN32
+#if _WIN32
 #define WIN32_LEAN_AND_MEAN
 #define NOWINRES
 #define NOSERVICE
diff --git a/dlls/gargantua.cpp b/dlls/gargantua.cpp
index b82bb02f..bc4205e5 100644
--- a/dlls/gargantua.cpp
+++ b/dlls/gargantua.cpp
@@ -12,7 +12,7 @@
 *   use or distribution of this code by or to any unlicensed person is illegal.
 *
 ****/
-#ifndef OEM_BUILD
+#if !OEM_BUILD
 
 //=========================================================
 // Gargantua
diff --git a/dlls/gauss.cpp b/dlls/gauss.cpp
index c9352e8e..6c4c0a08 100644
--- a/dlls/gauss.cpp
+++ b/dlls/gauss.cpp
@@ -12,7 +12,7 @@
 *   without written permission from Valve LLC.
 *
 ****/
-#if !defined( OEM_BUILD ) && !defined( HLDEMO_BUILD )
+#if !OEM_BUILD && !HLDEMO_BUILD
 
 #include "extdll.h"
 #include "util.h"
@@ -46,7 +46,7 @@ LINK_ENTITY_TO_CLASS( weapon_gauss, CGauss )
 
 float CGauss::GetFullChargeTime( void )
 {
-#ifdef CLIENT_DLL
+#if CLIENT_DLL
 	if( bIsMultiplayer() )
 #else
 	if( g_pGameRules->IsMultiplayer() )
@@ -58,7 +58,7 @@ float CGauss::GetFullChargeTime( void )
 	return 4.0f;
 }
 
-#ifdef CLIENT_DLL
+#if CLIENT_DLL
 extern int g_irunninggausspred;
 #endif
 
@@ -228,7 +228,7 @@ void CGauss::SecondaryAttack()
 		// during the charging process, eat one bit of ammo every once in a while
 		if( UTIL_WeaponTimeBase() >= m_pPlayer->m_flNextAmmoBurn && m_pPlayer->m_flNextAmmoBurn != 1000 )
 		{
-#ifdef CLIENT_DLL
+#if CLIENT_DLL
 			if( bIsMultiplayer() )
 #else
 			if( g_pGameRules->IsMultiplayer() )
@@ -271,7 +271,7 @@ void CGauss::SecondaryAttack()
 		if( m_iSoundState == 0 )
 			ALERT( at_console, "sound state %d\n", m_iSoundState );
 
-#ifdef GAUSS_OVERCHARGE_FIX
+#if GAUSS_OVERCHARGE_FIX
 		if (!overcharge)
 #endif
 			PLAYBACK_EVENT_FULL( FEV_NOTHOST, m_pPlayer->edict(), m_usGaussSpin, 0.0f, g_vecZero, g_vecZero, 0.0f, 0.0f, pitch, 0, ( m_iSoundState == SND_CHANGE_PITCH ) ? 1 : 0, 0 );
@@ -284,7 +284,7 @@ void CGauss::SecondaryAttack()
 		if( overcharge )
 		{
 			// Player charged up too long. Zap him.
-#ifdef GAUSS_OVERCHARGE_FIX
+#if GAUSS_OVERCHARGE_FIX
 			PLAYBACK_EVENT_FULL( FEV_NOTHOST, m_pPlayer->edict(), m_usGaussSpin, 0.0, g_vecZero, g_vecZero, 0.0, 0.0, pitch, 0, 0, 1 );
 #endif
 			EMIT_SOUND_DYN( ENT( m_pPlayer->pev ), CHAN_WEAPON, "weapons/electro4.wav", 1.0f, ATTN_NORM, 0, 80 + RANDOM_LONG( 0, 0x3f ) );
@@ -293,7 +293,7 @@ void CGauss::SecondaryAttack()
 			m_fInAttack = 0;
 			m_flTimeWeaponIdle = UTIL_WeaponTimeBase() + 1.0f;
 			m_pPlayer->m_flNextAttack = UTIL_WeaponTimeBase() + 1.0f;
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 			m_pPlayer->TakeDamage( VARS( eoNullEntity ), VARS( eoNullEntity ), 50, DMG_SHOCK );
 			UTIL_ScreenFade( m_pPlayer, Vector( 255, 128, 0 ), 2, 0.5f, 128, FFADE_IN );
 #endif
@@ -331,7 +331,7 @@ void CGauss::StartFire( void )
 	if( m_fPrimaryFire )
 	{
 		// fixed damage on primary attack
-#ifdef CLIENT_DLL
+#if CLIENT_DLL
 		flDamage = 20.0f;
 #else 
 		flDamage = gSkillData.plrDmgGauss;
@@ -341,7 +341,7 @@ void CGauss::StartFire( void )
 	if( m_fInAttack != 3 )
 	{
 		//ALERT( at_console, "Time:%f Damage:%f\n", gpGlobals->time - m_pPlayer->m_flStartCharge, flDamage );
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 		float flZVel = m_pPlayer->pev->velocity.z;
 
 		if( !m_fPrimaryFire )
@@ -369,7 +369,7 @@ void CGauss::Fire( Vector vecOrigSrc, Vector vecDir, float flDamage )
 {
 	m_pPlayer->m_iWeaponVolume = GAUSS_PRIMARY_FIRE_VOLUME;
 	TraceResult tr, beam_tr;
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 	Vector vecSrc = vecOrigSrc;
 	Vector vecDest = vecSrc + vecDir * 8192.0f;
 	edict_t	*pentIgnore;
@@ -399,7 +399,7 @@ void CGauss::Fire( Vector vecOrigSrc, Vector vecDir, float flDamage )
 
 	//ALERT( at_console, "%f %f\n", tr.flFraction, flMaxFrac );
 
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 	while( flDamage > 10 && nMaxHits > 0 )
 	{
 		nMaxHits--;
@@ -591,7 +591,7 @@ void CGauss::WeaponIdle( void )
 			iAnim = GAUSS_FIDGET;
 			m_flTimeWeaponIdle = UTIL_WeaponTimeBase() + 3.0f;
 		}
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 		SendWeaponAnim( iAnim );
 #endif
 	}
diff --git a/dlls/glock.cpp b/dlls/glock.cpp
index db0cf082..d9411d66 100644
--- a/dlls/glock.cpp
+++ b/dlls/glock.cpp
@@ -132,7 +132,7 @@ void CGlock::GlockFire( float flSpread, float flCycleTime, BOOL fUseAutoAim )
 	m_pPlayer->pev->effects = (int)( m_pPlayer->pev->effects ) | EF_MUZZLEFLASH;
 
 	int flags;
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 	flags = FEV_NOTHOST;
 #else
 	flags = 0;
diff --git a/dlls/h_cycler.cpp b/dlls/h_cycler.cpp
index 1c5a9150..ef356e8a 100644
--- a/dlls/h_cycler.cpp
+++ b/dlls/h_cycler.cpp
@@ -29,7 +29,7 @@
 #include "player.h"
 
 #define TEMP_FOR_SCREEN_SHOTS
-#ifdef TEMP_FOR_SCREEN_SHOTS //===================================================
+#if defined(TEMP_FOR_SCREEN_SHOTS) //===================================================
 
 class CCycler : public CBaseMonster
 {
diff --git a/dlls/h_export.cpp b/dlls/h_export.cpp
index d36bd5be..11884f9c 100644
--- a/dlls/h_export.cpp
+++ b/dlls/h_export.cpp
@@ -29,7 +29,7 @@
 enginefuncs_t	 g_engfuncs;
 globalvars_t	*gpGlobals;
 
-#ifdef _WIN32
+#if _WIN32
 
 // Required DLL entry point
 BOOL WINAPI DllMain( HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved )
diff --git a/dlls/handgrenade.cpp b/dlls/handgrenade.cpp
index 4d866708..0e9fde30 100644
--- a/dlls/handgrenade.cpp
+++ b/dlls/handgrenade.cpp
@@ -43,7 +43,7 @@ void CHandGrenade::Spawn()
 	m_iId = WEAPON_HANDGRENADE;
 	SET_MODEL( ENT( pev ), "models/w_grenade.mdl" );
 
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 	pev->dmg = gSkillData.plrDmgHandGrenade;
 #endif
 	m_iDefaultAmmo = HANDGRENADE_DEFAULT_GIVE;
diff --git a/dlls/hassassin.cpp b/dlls/hassassin.cpp
index c98c940f..36672d56 100644
--- a/dlls/hassassin.cpp
+++ b/dlls/hassassin.cpp
@@ -12,7 +12,7 @@
 *   use or distribution of this code by or to any unlicensed person is illegal.
 *
 ****/
-#if !defined( OEM_BUILD ) && !defined( HLDEMO_BUILD )
+#if !OEM_BUILD && !HLDEMO_BUILD
 
 //=========================================================
 // hassassin - Human assassin, fast and stealthy
diff --git a/dlls/hornetgun.cpp b/dlls/hornetgun.cpp
index 5e903b0d..f8c54fbe 100644
--- a/dlls/hornetgun.cpp
+++ b/dlls/hornetgun.cpp
@@ -12,7 +12,7 @@
 *   without written permission from Valve LLC.
 *
 ****/
-#if !defined( OEM_BUILD ) && !defined( HLDEMO_BUILD )
+#if !OEM_BUILD && !HLDEMO_BUILD
 
 #include "extdll.h"
 #include "util.h"
@@ -74,7 +74,7 @@ int CHgun::AddToPlayer( CBasePlayer *pPlayer )
 {
 	if( CBasePlayerWeapon::AddToPlayer( pPlayer ) )
 	{
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 		if( g_pGameRules->IsMultiplayer() )
 		{
 			// in multiplayer, all hivehands come full. 
@@ -131,7 +131,7 @@ void CHgun::PrimaryAttack()
 	{
 		return;
 	}
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 	UTIL_MakeVectors( m_pPlayer->pev->v_angle );
 
 	CBaseEntity *pHornet = CBaseEntity::Create( "hornet", m_pPlayer->GetGunPosition() + gpGlobals->v_forward * 16.0f + gpGlobals->v_right * 8.0f + gpGlobals->v_up * -12.0f, m_pPlayer->pev->v_angle, m_pPlayer->edict() );
@@ -145,7 +145,7 @@ void CHgun::PrimaryAttack()
 	m_pPlayer->m_iWeaponFlash = DIM_GUN_FLASH;
 
 	int flags;
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 	flags = FEV_NOTHOST;
 #else
 	flags = 0;
@@ -175,7 +175,7 @@ void CHgun::SecondaryAttack( void )
 	}
 
 	//Wouldn't be a bad idea to completely predict these, since they fly so fast...
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 	CBaseEntity *pHornet;
 	Vector vecSrc;
 
@@ -226,7 +226,7 @@ void CHgun::SecondaryAttack( void )
 	m_flRechargeTime = gpGlobals->time + 0.5f;
 #endif
 	int flags;
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 	flags = FEV_NOTHOST;
 #else
 	flags = 0;
diff --git a/dlls/ichthyosaur.cpp b/dlls/ichthyosaur.cpp
index 56ff96af..0f9fbf5a 100644
--- a/dlls/ichthyosaur.cpp
+++ b/dlls/ichthyosaur.cpp
@@ -12,7 +12,7 @@
 *   use or distribution of this code by or to any unlicensed person is illegal.
 *
 ****/
-#if !defined( OEM_BUILD ) && !defined( HLDEMO_BUILD )
+#if !OEM_BUILD && !HLDEMO_BUILD
 
 //=========================================================
 // icthyosaur - evin, satan fish monster
diff --git a/dlls/monsters.cpp b/dlls/monsters.cpp
index ab82cca5..9f1f57f2 100644
--- a/dlls/monsters.cpp
+++ b/dlls/monsters.cpp
@@ -728,7 +728,7 @@ BOOL CBaseMonster::MoveToNode( Activity movementAct, float waitTime, const Vecto
 	return FRefreshRoute();
 }
 
-#ifdef _DEBUG
+#if _DEBUG
 void DrawRoute( entvars_t *pev, WayPoint_t *m_Route, int m_iRouteIndex, int r, int g, int b )
 {
 	int i;
diff --git a/dlls/mp5.cpp b/dlls/mp5.cpp
index 47d0a24d..2b2d07ab 100644
--- a/dlls/mp5.cpp
+++ b/dlls/mp5.cpp
@@ -150,7 +150,7 @@ void CMP5::PrimaryAttack()
 	Vector vecSrc = m_pPlayer->GetGunPosition();
 	Vector vecAiming = m_pPlayer->GetAutoaimVector( AUTOAIM_5DEGREES );
 	Vector vecDir;
-#ifdef CLIENT_DLL
+#if CLIENT_DLL
 	if( bIsMultiplayer() )
 #else
 	if( g_pGameRules->IsMultiplayer() )
@@ -166,7 +166,7 @@ void CMP5::PrimaryAttack()
 	}
 
 	int flags;
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 	flags = FEV_NOTHOST;
 #else
 	flags = 0;
@@ -220,7 +220,7 @@ void CMP5::SecondaryAttack( void )
 					gpGlobals->v_forward * 800.0f );
 
 	int flags;
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 	flags = FEV_NOTHOST;
 #else
 	flags = 0;
diff --git a/dlls/multiplay_gamerules.cpp b/dlls/multiplay_gamerules.cpp
index 137b3eeb..da199271 100644
--- a/dlls/multiplay_gamerules.cpp
+++ b/dlls/multiplay_gamerules.cpp
@@ -26,7 +26,7 @@
 #include	"skill.h"
 #include	"game.h"
 #include	"items.h"
-#ifndef NO_VOICEGAMEMGR
+#if !NO_VOICEGAMEMGR
 #include	"voice_gamemgr.h"
 #endif
 #include	"hltv.h"
@@ -46,7 +46,7 @@ extern int g_teamplay;
 
 float g_flIntermissionStartTime = 0;
 
-#ifndef NO_VOICEGAMEMGR
+#if !NO_VOICEGAMEMGR
 CVoiceGameMgr	g_VoiceGameMgr;
 
 class CMultiplayGameMgrHelper : public IVoiceGameMgrHelper
@@ -73,7 +73,7 @@ static CMultiplayGameMgrHelper g_GameMgrHelper;
 //*********************************************************
 CHalfLifeMultiplay::CHalfLifeMultiplay()
 {
-#ifndef NO_VOICEGAMEMGR
+#if !NO_VOICEGAMEMGR
 	g_VoiceGameMgr.Init( &g_GameMgrHelper, gpGlobals->maxClients );
 #endif
 	RefreshSkillData();
@@ -123,7 +123,7 @@ CHalfLifeMultiplay::CHalfLifeMultiplay()
 
 BOOL CHalfLifeMultiplay::ClientCommand( CBasePlayer *pPlayer, const char *pcmd )
 {
-#ifndef NO_VOICEGAMEMGR
+#if !NO_VOICEGAMEMGR
 	if( g_VoiceGameMgr.ClientCommand( pPlayer, pcmd ) )
 		return TRUE;
 #endif
@@ -194,7 +194,7 @@ extern cvar_t mp_chattime;
 //=========================================================
 void CHalfLifeMultiplay::Think( void )
 {
-#ifndef NO_VOICEGAMEMGR
+#if !NO_VOICEGAMEMGR
 	g_VoiceGameMgr.Update( gpGlobals->frametime );
 #endif
 
@@ -414,7 +414,7 @@ BOOL CHalfLifeMultiplay::GetNextBestWeapon( CBasePlayer *pPlayer, CBasePlayerIte
 //=========================================================
 BOOL CHalfLifeMultiplay::ClientConnected( edict_t *pEntity, const char *pszName, const char *pszAddress, char szRejectReason[128] )
 {
-#ifndef NO_VOICEGAMEMGR
+#if !NO_VOICEGAMEMGR
 	g_VoiceGameMgr.ClientConnected( pEntity );
 #endif
 	return TRUE;
diff --git a/dlls/nihilanth.cpp b/dlls/nihilanth.cpp
index 29e1073e..951ee38c 100644
--- a/dlls/nihilanth.cpp
+++ b/dlls/nihilanth.cpp
@@ -12,7 +12,7 @@
 *   use or distribution of this code by or to any unlicensed person is illegal.
 *
 ****/
-#if !defined( OEM_BUILD ) && !defined( HLDEMO_BUILD )
+#if !OEM_BUILD && !HLDEMO_BUILD
 
 #include "extdll.h"
 #include "util.h"
diff --git a/dlls/nodes.cpp b/dlls/nodes.cpp
index f5f399a0..e74e3cc8 100644
--- a/dlls/nodes.cpp
+++ b/dlls/nodes.cpp
@@ -42,7 +42,7 @@ CGraph WorldGraph;
 LINK_ENTITY_TO_CLASS( info_node, CNodeEnt )
 LINK_ENTITY_TO_CLASS( info_node_air, CNodeEnt )
 
-#ifdef __DOS__
+#if __DOS__
 #include <direct.h>
 #define CreateDirectoryA(p, n) mkdir(p)
 #elif !defined _WIN32
@@ -2060,7 +2060,7 @@ void CTestHull::BuildNodeGraph( void )
 		fprintf( file, "\nAll Connections are Paired!\n" );
 	}
 
-#ifdef _MSC_VER
+#if _MSC_VER
 #define SIZET_FMT "%Iu"
 #else
 #define SIZET_FMT "%zu"
diff --git a/dlls/nodes.h b/dlls/nodes.h
index 4bc1ec1b..d6b36928 100644
--- a/dlls/nodes.h
+++ b/dlls/nodes.h
@@ -106,7 +106,7 @@ typedef struct
 // CGraph 
 //=========================================================
 #define _GRAPH_VERSION_RETAIL 16 // Retail Half-Life graph version. Don't increment this
-#ifdef XASH_64BIT
+#if defined(XASH_64BIT)
 #define	_GRAPH_VERSION	(16 * 10)
 #else
 #define	_GRAPH_VERSION	(16) // !!!increment this whenever graph/node/link classes change, to obsolesce older disk files.
@@ -215,7 +215,7 @@ public:
 
 	inline	CNode &Node( int i )
 	{
-#ifdef _DEBUG
+#if _DEBUG
 		if ( !m_pNodes || i < 0 || i > m_cNodes )
 			ALERT( at_error, "Bad Node!\n" );
 #endif
@@ -224,7 +224,7 @@ public:
 
 	inline	CLink &Link( int i )
 	{
-#ifdef _DEBUG
+#if _DEBUG
 		if ( !m_pLinkPool || i < 0 || i > m_cLinks )
 			ALERT( at_error, "Bad link!\n" );
 #endif
diff --git a/dlls/player.cpp b/dlls/player.cpp
index dd7e6988..bfbc3310 100644
--- a/dlls/player.cpp
+++ b/dlls/player.cpp
@@ -2603,7 +2603,7 @@ pt_end:
 	// Track button info so we can detect 'pressed' and 'released' buttons next frame
 	m_afButtonLast = pev->button;
 
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 	// Decay timers on weapons
 	// go through all of the weapons and make a list of the ones to pack
 	for( int i = 0; i < MAX_ITEM_TYPES; i++ )
@@ -2998,7 +2998,7 @@ int CBasePlayer::Restore( CRestore &restore )
 
 	RenewItems();
 
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 	// HACK:	This variable is saved/restored in CBaseMonster as a time variable, but we're using it
 	//			as just a counter.  Ideally, this needs its own variable that's saved as a plain float.
 	//			Barring that, we clear it out here instead of using the incorrect restored time value.
@@ -3433,7 +3433,7 @@ void CBasePlayer::ImpulseCommands()
 //=========================================================
 void CBasePlayer::CheatImpulseCommands( int iImpulse )
 {
-#if !defined( HLDEMO_BUILD )
+#if !HLDEMO_BUILD
 	if( g_flWeaponCheat == 0.0f )
 	{
 		return;
@@ -3471,7 +3471,7 @@ void CBasePlayer::CheatImpulseCommands( int iImpulse )
 		GiveNamedItem( "ammo_ARgrenades" );
 		GiveNamedItem( "weapon_handgrenade" );
 		GiveNamedItem( "weapon_tripmine" );
-#ifndef OEM_BUILD
+#if !OEM_BUILD
 		GiveNamedItem( "weapon_357" );
 		GiveNamedItem( "ammo_357" );
 		GiveNamedItem( "weapon_crossbow" );
@@ -3757,7 +3757,7 @@ Called every frame by the player PreThink
 */
 void CBasePlayer::ItemPreFrame()
 {
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 	if( m_flNextAttack > 0 )
 #else
 	if( gpGlobals->time < m_flNextAttack )
@@ -3787,7 +3787,7 @@ void CBasePlayer::ItemPostFrame()
 	if( m_pTank != 0 )
 		return;
 
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 	if( m_flNextAttack > 0 )
 #else
 	if( gpGlobals->time < m_flNextAttack )
diff --git a/dlls/python.cpp b/dlls/python.cpp
index d8bfd35f..567187c0 100644
--- a/dlls/python.cpp
+++ b/dlls/python.cpp
@@ -12,7 +12,7 @@
 *   without written permission from Valve LLC.
 *
 ****/
-#if !defined( OEM_BUILD ) && !defined( HLDEMO_BUILD )
+#if !OEM_BUILD && !HLDEMO_BUILD
 
 #include "extdll.h"
 #include "util.h"
@@ -97,7 +97,7 @@ void CPython::Precache( void )
 
 BOOL CPython::Deploy()
 {
-#ifdef CLIENT_DLL
+#if CLIENT_DLL
 	if( bIsMultiplayer() )
 #else
 	if( g_pGameRules->IsMultiplayer() )
@@ -130,7 +130,7 @@ void CPython::Holster( int skiplocal /* = 0 */ )
 
 void CPython::SecondaryAttack( void )
 {
-#ifdef CLIENT_DLL
+#if CLIENT_DLL
 	if( !bIsMultiplayer() )
 #else
 	if( !g_pGameRules->IsMultiplayer() )
@@ -195,7 +195,7 @@ void CPython::PrimaryAttack()
 	vecDir = m_pPlayer->FireBulletsPlayer( 1, vecSrc, vecAiming, VECTOR_CONE_1DEGREES, 8192, BULLET_PLAYER_357, 0, 0, m_pPlayer->pev, m_pPlayer->random_seed );
 
 	int flags;
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 	flags = FEV_NOTHOST;
 #else
 	flags = 0;
@@ -222,7 +222,7 @@ void CPython::Reload( void )
 	}
 
 	int bUseScope = FALSE;
-#ifdef CLIENT_DLL
+#if CLIENT_DLL
 	bUseScope = bIsMultiplayer();
 #else
 	bUseScope = g_pGameRules->IsMultiplayer();
@@ -273,7 +273,7 @@ void CPython::WeaponIdle( void )
 	}
 	
 	int bUseScope = FALSE;
-#ifdef CLIENT_DLL
+#if CLIENT_DLL
 	bUseScope = bIsMultiplayer();
 #else
 	bUseScope = g_pGameRules->IsMultiplayer();
diff --git a/dlls/rpg.cpp b/dlls/rpg.cpp
index 0b5b5f7b..65f1bd49 100644
--- a/dlls/rpg.cpp
+++ b/dlls/rpg.cpp
@@ -12,7 +12,7 @@
 *   without written permission from Valve LLC.
 *
 ****/
-#if !defined( OEM_BUILD )
+#if !OEM_BUILD
 
 #include "extdll.h"
 #include "util.h"
@@ -39,7 +39,7 @@ enum rpg_e
 
 LINK_ENTITY_TO_CLASS( weapon_rpg, CRpg )
 
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 
 LINK_ENTITY_TO_CLASS( laser_spot, CLaserSpot )
 
@@ -306,7 +306,7 @@ void CRpg::Reload( void )
 		return;
 	}
 
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 	if( m_pSpot && m_fSpotActive )
 	{
 		m_pSpot->Suspend( 2.1f );
@@ -329,7 +329,7 @@ void CRpg::Spawn()
 	SET_MODEL( ENT( pev ), "models/w_rpg.mdl" );
 	m_fSpotActive = 1;
 
-#ifdef CLIENT_DLL
+#if CLIENT_DLL
 	if( bIsMultiplayer() )
 #else
 	if( g_pGameRules->IsMultiplayer() )
@@ -421,7 +421,7 @@ void CRpg::Holster( int skiplocal /* = 0 */ )
 
 	SendWeaponAnim( RPG_HOLSTER1 );
 
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 	if( m_pSpot )
 	{
 		m_pSpot->Killed( NULL, GIB_NEVER );
@@ -437,7 +437,7 @@ void CRpg::PrimaryAttack()
 		m_pPlayer->m_iWeaponVolume = LOUD_GUN_VOLUME;
 		m_pPlayer->m_iWeaponFlash = BRIGHT_GUN_FLASH;
 
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 		// player "shoot" animation
 		m_pPlayer->SetAnimation( PLAYER_ATTACK1 );
 
@@ -454,7 +454,7 @@ void CRpg::PrimaryAttack()
 		// Ken signed up for this as a global change (sjb)
 
 		int flags;
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 	flags = FEV_NOTHOST;
 #else
 	flags = 0;
@@ -480,7 +480,7 @@ void CRpg::SecondaryAttack()
 {
 	m_fSpotActive = !m_fSpotActive;
 
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 	if( !m_fSpotActive && m_pSpot )
 	{
 		m_pSpot->Killed( NULL, GIB_NORMAL );
@@ -532,7 +532,7 @@ void CRpg::WeaponIdle( void )
 
 void CRpg::UpdateSpot( void )
 {
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 	if( m_fSpotActive )
 	{
 		if (m_pPlayer->pev->viewmodel == 0)
@@ -571,7 +571,7 @@ class CRpgAmmo : public CBasePlayerAmmo
 	BOOL AddAmmo( CBaseEntity *pOther ) 
 	{ 
 		int iGive;
-#ifdef CLIENT_DLL
+#if CLIENT_DLL
 	if( bIsMultiplayer() )
 #else
 	if( g_pGameRules->IsMultiplayer() )
diff --git a/dlls/satchel.cpp b/dlls/satchel.cpp
index 09e431c5..528a3ba8 100644
--- a/dlls/satchel.cpp
+++ b/dlls/satchel.cpp
@@ -12,7 +12,7 @@
 *   without written permission from Valve LLC.
 *
 ****/
-#if !defined( OEM_BUILD ) && !defined( HLDEMO_BUILD )
+#if !OEM_BUILD && !HLDEMO_BUILD
 
 #include "extdll.h"
 #include "util.h"
@@ -193,7 +193,7 @@ int CSatchel::AddDuplicate( CBasePlayerItem *pOriginal )
 {
 	CSatchel *pSatchel;
 
-#ifdef CLIENT_DLL
+#if CLIENT_DLL
 	if( bIsMultiplayer() )
 #else
 	if( g_pGameRules->IsMultiplayer() )
@@ -376,7 +376,7 @@ void CSatchel::Throw( void )
 {
 	if( m_pPlayer->m_rgAmmo[m_iPrimaryAmmoType] )
 	{
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 		Vector vecSrc = m_pPlayer->pev->origin;
 
 		Vector vecThrow = gpGlobals->v_forward * 274 + m_pPlayer->pev->velocity;
@@ -430,7 +430,7 @@ void CSatchel::WeaponIdle( void )
 			return;
 		}
 
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 		m_pPlayer->pev->viewmodel = MAKE_STRING( "models/v_satchel.mdl" );
 		m_pPlayer->pev->weaponmodel = MAKE_STRING( "models/p_satchel.mdl" );
 #else
diff --git a/dlls/saverestore.h b/dlls/saverestore.h
index 81f9f131..5eec01e2 100644
--- a/dlls/saverestore.h
+++ b/dlls/saverestore.h
@@ -157,7 +157,7 @@ public:
 	int				Restore( CRestore &restore );
 	static TYPEDESCRIPTION m_SaveData[];
 
-//#ifdef _DEBUG
+//#if _DEBUG
 	void			DumpGlobals( void );
 //#endif
 
diff --git a/dlls/schedule.cpp b/dlls/schedule.cpp
index 2a4cc311..7512c9fa 100644
--- a/dlls/schedule.cpp
+++ b/dlls/schedule.cpp
@@ -181,7 +181,7 @@ BOOL CBaseMonster::FScheduleValid( void )
 
 	if( HasConditions( m_pSchedule->iInterruptMask | bits_COND_SCHEDULE_DONE | bits_COND_TASK_FAILED ) )
 	{
-#ifdef DEBUG
+#if DEBUG
 		if( HasConditions( bits_COND_TASK_FAILED ) && m_failSchedule == SCHED_NONE )
 		{
 			// fail! Send a visual indicator.
diff --git a/dlls/shotgun.cpp b/dlls/shotgun.cpp
index 9c84c5c2..7b263a21 100644
--- a/dlls/shotgun.cpp
+++ b/dlls/shotgun.cpp
@@ -137,7 +137,7 @@ void CShotgun::PrimaryAttack()
 	m_iClip--;
 
 	int flags;
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 	flags = FEV_NOTHOST;
 #else
 	flags = 0;
@@ -152,7 +152,7 @@ void CShotgun::PrimaryAttack()
 
 	Vector vecDir;
 
-#ifdef CLIENT_DLL
+#if CLIENT_DLL
 	if( bIsMultiplayer() )
 #else
 	if( g_pGameRules->IsMultiplayer() )
@@ -207,7 +207,7 @@ void CShotgun::SecondaryAttack( void )
 	m_iClip -= 2;
 
 	int flags;
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 	flags = FEV_NOTHOST;
 #else
 	flags = 0;
@@ -222,7 +222,7 @@ void CShotgun::SecondaryAttack( void )
 
 	Vector vecDir;
 
-#ifdef CLIENT_DLL
+#if CLIENT_DLL
 	if( bIsMultiplayer() )
 #else
 	if( g_pGameRules->IsMultiplayer() )
diff --git a/dlls/soundent.cpp b/dlls/soundent.cpp
index 7d9583f0..ea319989 100644
--- a/dlls/soundent.cpp
+++ b/dlls/soundent.cpp
@@ -367,7 +367,7 @@ int CSoundEnt::ClientSoundIndex( edict_t *pClient )
 {
 	int iReturn = ENTINDEX( pClient ) - 1;
 
-#ifdef _DEBUG
+#if _DEBUG
 	if( iReturn < 0 || iReturn > gpGlobals->maxClients )
 	{
 		ALERT( at_console, "** ClientSoundIndex returning a bogus value! **\n" );
diff --git a/dlls/squeakgrenade.cpp b/dlls/squeakgrenade.cpp
index 7e8a9d92..4bf2e3df 100644
--- a/dlls/squeakgrenade.cpp
+++ b/dlls/squeakgrenade.cpp
@@ -12,7 +12,7 @@
 *   without written permission from Valve LLC.
 *
 ****/
-#if !defined( OEM_BUILD ) && !defined( HLDEMO_BUILD )
+#if !OEM_BUILD && !HLDEMO_BUILD
 
 #include "extdll.h"
 #include "util.h"
@@ -42,7 +42,7 @@ enum squeak_e
 	SQUEAK_THROW
 };
 
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 class CSqueakGrenade : public CGrenade
 {
 	void Spawn( void );
@@ -503,7 +503,7 @@ void CSqueak::PrimaryAttack()
 		UTIL_TraceLine( trace_origin + gpGlobals->v_forward * 20.0f, trace_origin + gpGlobals->v_forward * 64.0f, dont_ignore_monsters, NULL, &tr );
 
 		int flags;
-#ifdef CLIENT_WEAPONS
+#if CLIENT_WEAPONS
 		flags = FEV_NOTHOST;
 #else
 		flags = 0;
@@ -514,7 +514,7 @@ void CSqueak::PrimaryAttack()
 		{
 			// player "shoot" animation
 			m_pPlayer->SetAnimation( PLAYER_ATTACK1 );
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 			CBaseEntity *pSqueak = CBaseEntity::Create( "monster_snark", tr.vecEndPos, m_pPlayer->pev->v_angle, m_pPlayer->edict() );
 			pSqueak->pev->velocity = gpGlobals->v_forward * 200.0f + m_pPlayer->pev->velocity;
 #endif
diff --git a/dlls/teamplay_gamerules.cpp b/dlls/teamplay_gamerules.cpp
index ea733fa4..6f53582a 100644
--- a/dlls/teamplay_gamerules.cpp
+++ b/dlls/teamplay_gamerules.cpp
@@ -69,7 +69,7 @@ CHalfLifeTeamplay::CHalfLifeTeamplay()
 
 extern cvar_t timeleft, fragsleft;
 
-#ifndef NO_VOICEGAMEMGR
+#if !NO_VOICEGAMEMGR
 #include "voice_gamemgr.h"
 extern CVoiceGameMgr g_VoiceGameMgr;
 #endif
@@ -82,7 +82,7 @@ void CHalfLifeTeamplay::Think( void )
 	int frags_remaining = 0;
 	int time_remaining = 0;
 
-#ifndef NO_VOICEGAMEMGR
+#if !NO_VOICEGAMEMGR
 	g_VoiceGameMgr.Update(gpGlobals->frametime);
 #endif
 	if( g_fGameOver )   // someone else quit the game already
@@ -148,7 +148,7 @@ void CHalfLifeTeamplay::Think( void )
 //=========================================================
 BOOL CHalfLifeTeamplay::ClientCommand( CBasePlayer *pPlayer, const char *pcmd )
 {
-#ifndef NO_VOICEGAMEMGR
+#if !NO_VOICEGAMEMGR
 	if( g_VoiceGameMgr.ClientCommand( pPlayer, pcmd ) )
 		return TRUE;
 #endif
diff --git a/dlls/tentacle.cpp b/dlls/tentacle.cpp
index c860fcb3..685540d5 100644
--- a/dlls/tentacle.cpp
+++ b/dlls/tentacle.cpp
@@ -12,7 +12,7 @@
 *   use or distribution of this code by or to any unlicensed person is illegal.
 *
 ****/
-#if !defined( OEM_BUILD ) && !defined( HLDEMO_BUILD )
+#if !OEM_BUILD && !HLDEMO_BUILD
 
 /*
 
diff --git a/dlls/tripmine.cpp b/dlls/tripmine.cpp
index 50ea8c37..9da8b90e 100644
--- a/dlls/tripmine.cpp
+++ b/dlls/tripmine.cpp
@@ -38,7 +38,7 @@ enum tripmine_e
 	TRIPMINE_GROUND
 };
 
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 class CTripmineGrenade : public CGrenade
 {
 	void Spawn( void );
@@ -368,7 +368,7 @@ void CTripmine::Spawn()
 
 	m_iDefaultAmmo = TRIPMINE_DEFAULT_GIVE;
 
-#ifdef CLIENT_DLL
+#if CLIENT_DLL
 	if( !bIsMultiplayer() )
 #else
 	if( !g_pGameRules->IsDeathmatch() )
@@ -439,7 +439,7 @@ void CTripmine::PrimaryAttack( void )
 	UTIL_TraceLine( vecSrc, vecSrc + vecAiming * 128.0f, dont_ignore_monsters, ENT( m_pPlayer->pev ), &tr );
 
 	int flags;
-#ifdef CLIENT_WEAPONS
+#if CLIENT_WEAPONS
 	flags = FEV_NOTHOST;
 #else
 	flags = 0;
diff --git a/dlls/util.cpp b/dlls/util.cpp
index e2e4292d..483d6748 100644
--- a/dlls/util.cpp
+++ b/dlls/util.cpp
@@ -33,7 +33,7 @@
 
 float UTIL_WeaponTimeBase( void )
 {
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 	return 0.0f;
 #else
 	return gpGlobals->time;
@@ -309,7 +309,7 @@ TYPEDESCRIPTION	gEntvarsDescription[] =
 
 #define ENTVARS_COUNT		( sizeof(gEntvarsDescription) / sizeof(gEntvarsDescription[0]) )
 
-#ifdef	DEBUG
+#if	DEBUG
 edict_t *DBG_EntOfVars( const entvars_t *pev )
 {
 	if( pev->pContainingEntity != NULL )
@@ -1596,7 +1596,7 @@ static int gSizes[FIELD_TYPECOUNT] =
 	sizeof(float) * 3,	// FIELD_POSITION_VECTOR
 	sizeof(void *),		// FIELD_POINTER
 	sizeof(int),		// FIELD_INTEGER
-#ifdef GNUC
+#if GNUC
 	sizeof(void *) * 2,	// FIELD_FUNCTION
 #else
 	sizeof(void *),		// FIELD_FUNCTION	
@@ -1623,7 +1623,7 @@ static int gInputSizes[FIELD_TYPECOUNT] =
 	sizeof(float) * 3,	// FIELD_POSITION_VECTOR
 	sizeof(void *),		// FIELD_POINTER
 	sizeof(int),		// FIELD_INTEGER
-#ifdef GNUC
+#if GNUC
 	sizeof(void *) * 2,	// FIELD_FUNCTION
 #else
 	sizeof(void *),		// FIELD_FUNCTION
@@ -1840,7 +1840,7 @@ void CSave::WriteTime( const char *pname, const float *data, int count )
 
 void CSave::WriteString( const char *pname, const char *pdata )
 {
-#ifdef TOKENIZE
+#if TOKENIZE
 	short token = (short)TokenHash( pdata );
 	WriteShort( pname, &token, 1 );
 #else
@@ -1851,7 +1851,7 @@ void CSave::WriteString( const char *pname, const char *pdata )
 void CSave::WriteString( const char *pname, const int *stringId, int count )
 {
 	int i, size;
-#ifdef TOKENIZE
+#if TOKENIZE
 	short token = (short)TokenHash( STRING( *stringId ) );
 	WriteShort( pname, &token, 1 );
 #else
@@ -2169,7 +2169,7 @@ int CRestore::ReadField( void *pBaseData, TYPEDESCRIPTION *pFields, int fieldCou
 					switch( pTest->fieldType )
 					{
 					case FIELD_TIME:
-					#ifdef __VFP_FP__
+					#if __VFP_FP__
 						memcpy( &timeData, pInputData, 4 );
 						// Re-base time variables
 						timeData += time;
@@ -2255,7 +2255,7 @@ int CRestore::ReadField( void *pBaseData, TYPEDESCRIPTION *pFields, int fieldCou
 							*( (EOFFSET *)pOutputData ) = 0;
 						break;
 					case FIELD_VECTOR:
-						#ifdef __VFP_FP__
+						#if __VFP_FP__
 						memcpy( pOutputData, pInputData, sizeof( Vector ) );
 						#else
 						( (float *)pOutputData )[0] = ( (float *)pInputData )[0];
@@ -2264,7 +2264,7 @@ int CRestore::ReadField( void *pBaseData, TYPEDESCRIPTION *pFields, int fieldCou
 						#endif
 						break;
 					case FIELD_POSITION_VECTOR:
-						#ifdef  __VFP_FP__
+						#if  __VFP_FP__
 						{
 							Vector tmp;
 							memcpy( &tmp, pInputData, sizeof( Vector ) );
@@ -2401,7 +2401,7 @@ char *CRestore::ReadNamedString( const char *pName )
 	HEADER header;
 
 	BufferReadHeader( &header );
-#ifdef TOKENIZE
+#if TOKENIZE
 	return (char *)( m_pdata->pTokens[*(short *)header.pData] );
 #else
 	return (char *)header.pData;
diff --git a/dlls/util.h b/dlls/util.h
index 08c5af05..ad7981ad 100644
--- a/dlls/util.h
+++ b/dlls/util.h
@@ -35,7 +35,7 @@ extern globalvars_t				*gpGlobals;
 // Use this instead of ALLOC_STRING on constant strings
 #define STRING(offset)		(const char *)(gpGlobals->pStringBase + (int)offset)
 
-#if !defined XASH_64BIT || defined(CLIENT_DLL)
+#if !defined(XASH_64BIT) || CLIENT_DLL
 #define MAKE_STRING(str)	((int)(long int)str - (int)(long int)STRING(0))
 #else
 static inline int MAKE_STRING(const char *szValue)
@@ -104,7 +104,7 @@ typedef int BOOL;
 // The _declspec forces them to be exported by name so we can do a lookup with GetProcAddress()
 // The function is used to intialize / allocate the object for the entity
 
-#if defined(CLIENT_DLL)
+#if CLIENT_DLL
 #define LINK_ENTITY_TO_CLASS(mapClassName,DLLClassName)
 #else // CLIENT_DLL
 #define LINK_ENTITY_TO_CLASS(mapClassName,DLLClassName) extern "C" EXPORT void mapClassName( entvars_t *pev ); void mapClassName( entvars_t *pev ) { GetClassPtr( (DLLClassName *)pev ); }
@@ -113,7 +113,7 @@ typedef int BOOL;
 //
 // Conversion among the three types of "entity", including identity-conversions.
 //
-#ifdef DEBUG
+#if DEBUG
 	extern edict_t *DBG_EntOfVars(const entvars_t *pev);
 	inline edict_t *ENT(const entvars_t *pev)	{ return DBG_EntOfVars(pev); }
 #else
@@ -390,7 +390,7 @@ extern int BuildChangeList( LEVELLIST *pLevelList, int maxList );
 //
 // How did I ever live without ASSERT?
 //
-#ifdef	DEBUG
+#if	DEBUG
 void DBG_AssertFunction(BOOL fExpr, const char* szExpr, const char* szFile, int szLine, const char* szMessage);
 #define ASSERT(f)		DBG_AssertFunction(f, #f, __FILE__, __LINE__, NULL)
 #define ASSERTSZ(f, sz)	DBG_AssertFunction(f, #f, __FILE__, __LINE__, sz)
diff --git a/dlls/weapons.cpp b/dlls/weapons.cpp
index 38fc4f63..f0d2ff7e 100644
--- a/dlls/weapons.cpp
+++ b/dlls/weapons.cpp
@@ -321,7 +321,7 @@ void W_Precache( void )
 	// 9mm ammo box
 	UTIL_PrecacheOther( "ammo_9mmbox" );
 
-#if !defined( OEM_BUILD ) && !defined( HLDEMO_BUILD )
+#if !OEM_BUILD && !HLDEMO_BUILD
 	// python
 	UTIL_PrecacheOtherWeapon( "weapon_357" );
 	UTIL_PrecacheOther( "ammo_357" );
@@ -343,13 +343,13 @@ void W_Precache( void )
 #endif
 	// tripmine
 	UTIL_PrecacheOtherWeapon( "weapon_tripmine" );
-#if !defined( OEM_BUILD ) && !defined( HLDEMO_BUILD )
+#if !OEM_BUILD && !HLDEMO_BUILD
 	// satchel charge
 	UTIL_PrecacheOtherWeapon( "weapon_satchel" );
 #endif
 	// hand grenade
 	UTIL_PrecacheOtherWeapon("weapon_handgrenade");
-#if !defined( OEM_BUILD ) && !defined( HLDEMO_BUILD )
+#if !OEM_BUILD && !HLDEMO_BUILD
 	// squeak grenade
 	UTIL_PrecacheOtherWeapon( "weapon_snark" );
 
@@ -403,7 +403,7 @@ IMPLEMENT_SAVERESTORE( CBasePlayerItem, CBaseAnimating )
 
 TYPEDESCRIPTION	CBasePlayerWeapon::m_SaveData[] =
 {
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 	DEFINE_FIELD( CBasePlayerWeapon, m_flNextPrimaryAttack, FIELD_FLOAT ),
 	DEFINE_FIELD( CBasePlayerWeapon, m_flNextSecondaryAttack, FIELD_FLOAT ),
 	DEFINE_FIELD( CBasePlayerWeapon, m_flTimeWeaponIdle, FIELD_FLOAT ),
@@ -587,7 +587,7 @@ void CBasePlayerItem::DefaultTouch( CBaseEntity *pOther )
 
 BOOL CanAttack( float attack_time, float curtime, BOOL isPredicted )
 {
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 	if( !isPredicted )
 #else
 	if( 1 )
@@ -827,7 +827,7 @@ void CBasePlayerWeapon::SendWeaponAnim( int iAnim, int skiplocal, int body )
 
 	m_pPlayer->pev->weaponanim = iAnim;
 
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 	if( skiplocal && ENGINE_CANSKIP( m_pPlayer->edict() ) )
 		return;
 #endif
diff --git a/dlls/weapons.h b/dlls/weapons.h
index 5763e613..d600ce96 100644
--- a/dlls/weapons.h
+++ b/dlls/weapons.h
@@ -453,7 +453,7 @@ public:
 	int m_cAmmoTypes;// how many ammo types packed into this box (if packed by a level designer)
 };
 
-#ifdef CLIENT_DLL
+#if CLIENT_DLL
 bool bIsMultiplayer ( void );
 void LoadVModel ( const char *szViewModel, CBasePlayer *m_pPlayer );
 #endif
@@ -476,7 +476,7 @@ public:
 
 	virtual BOOL UseDecrement( void )
 	{ 
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 		return TRUE;
 #else
 		return FALSE;
@@ -505,7 +505,7 @@ public:
 	int Swing( int fFirst );
 	BOOL Deploy( void );
 	void Holster( int skiplocal = 0 );
-#ifdef CROWBAR_IDLE_ANIM
+#if CROWBAR_IDLE_ANIM
 	void WeaponIdle();
 #endif
 	int m_iSwing;
@@ -513,7 +513,7 @@ public:
 
 	virtual BOOL UseDecrement( void )
 	{ 
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 		return TRUE;
 #else
 		return FALSE;
@@ -543,7 +543,7 @@ public:
 
 	virtual BOOL UseDecrement( void )
 	{
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 		return TRUE;
 #else
 		return FALSE;
@@ -574,7 +574,7 @@ public:
 
 	virtual BOOL UseDecrement( void )
 	{ 
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 		return TRUE;
 #else
 		return FALSE;
@@ -608,7 +608,7 @@ public:
 
 	virtual BOOL UseDecrement( void )
 	{ 
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 		return TRUE;
 #else
 		return FALSE;
@@ -623,7 +623,7 @@ private:
 class CShotgun : public CBasePlayerWeapon
 {
 public:
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 	int		Save( CSave &save );
 	int		Restore( CRestore &restore );
 	static	TYPEDESCRIPTION m_SaveData[];
@@ -646,7 +646,7 @@ public:
 
 	virtual BOOL UseDecrement( void )
 	{
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 		return TRUE;
 #else
 		return FALSE;
@@ -675,7 +675,7 @@ public:
 class CRpg : public CBasePlayerWeapon
 {
 public:
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 	int		Save( CSave &save );
 	int		Restore( CRestore &restore );
 	static	TYPEDESCRIPTION m_SaveData[];
@@ -704,7 +704,7 @@ public:
 
 	virtual BOOL UseDecrement( void )
 	{ 
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 		return TRUE;
 #else
 		return FALSE;
@@ -736,7 +736,7 @@ public:
 class CGauss : public CBasePlayerWeapon
 {
 public:
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 	int		Save( CSave &save );
 	int		Restore( CRestore &restore );
 	static	TYPEDESCRIPTION m_SaveData[];
@@ -768,7 +768,7 @@ public:
 
 	virtual BOOL UseDecrement( void )
 	{ 
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 		return TRUE;
 #else
 		return FALSE;
@@ -783,7 +783,7 @@ private:
 class CEgon : public CBasePlayerWeapon
 {
 public:
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 	int		Save( CSave &save );
 	int		Restore( CRestore &restore );
 	static	TYPEDESCRIPTION m_SaveData[];
@@ -826,7 +826,7 @@ public:
 
 	virtual BOOL UseDecrement( void )
 	{
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 		return TRUE;
 #else
 		return FALSE;
@@ -836,7 +836,7 @@ public:
 	unsigned short m_usEgonStop;
 
 private:
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 	float				m_shootTime;
 #endif
 	EGON_FIREMODE		m_fireMode;
@@ -849,7 +849,7 @@ private:
 class CHgun : public CBasePlayerWeapon
 {
 public:
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 	int		Save( CSave &save );
 	int		Restore( CRestore &restore );
 	static	TYPEDESCRIPTION m_SaveData[];
@@ -875,7 +875,7 @@ public:
 
 	virtual BOOL UseDecrement( void )
 	{ 
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 		return TRUE;
 #else
 		return FALSE;
@@ -901,7 +901,7 @@ public:
 
 	virtual BOOL UseDecrement( void )
 	{ 
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 		return TRUE;
 #else
 		return FALSE;
@@ -912,7 +912,7 @@ public:
 class CSatchel : public CBasePlayerWeapon
 {
 public:
-#ifndef CLIENT_DLL
+#if !CLIENT_DLL
 	int		Save( CSave &save );
 	int		Restore( CRestore &restore );
 	static	TYPEDESCRIPTION m_SaveData[];
@@ -935,7 +935,7 @@ public:
 
 	virtual BOOL UseDecrement( void )
 	{ 
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 		return TRUE;
 #else
 		return FALSE;
@@ -964,7 +964,7 @@ public:
 
 	virtual BOOL UseDecrement( void )
 	{ 
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 		return TRUE;
 #else
 		return FALSE;
@@ -992,7 +992,7 @@ public:
 
 	virtual BOOL UseDecrement( void )
 	{
-#if defined( CLIENT_WEAPONS )
+#if CLIENT_WEAPONS
 		return TRUE;
 #else
 		return FALSE;
diff --git a/dlls/world.cpp b/dlls/world.cpp
index 5adbdf9d..0d7db511 100644
--- a/dlls/world.cpp
+++ b/dlls/world.cpp
@@ -288,7 +288,7 @@ globalentity_t *CGlobalState::Find( string_t globalname )
 }
 
 // This is available all the time now on impulse 104, remove later
-//#ifdef _DEBUG
+//#if _DEBUG
 void CGlobalState::DumpGlobals( void )
 {
 	static const char *estates[] = { "Off", "On", "Dead" };
diff --git a/pm_shared/pm_debug.c b/pm_shared/pm_debug.c
index a11e0516..ce904760 100644
--- a/pm_shared/pm_debug.c
+++ b/pm_shared/pm_debug.c
@@ -14,7 +14,7 @@
 ****/
 #include <math.h>
 #include "mathlib.h"
-#ifdef HAVE_TGMATH_H
+#if HAVE_TGMATH_H
 #include <tgmath.h>
 #endif
 
@@ -27,7 +27,7 @@
 
 #include <string.h>
 
-#ifdef _MSC_VER
+#if _MSC_VER
 #pragma warning(disable : 4244)
 #pragma warning(disable : 4305)
 #endif
@@ -268,7 +268,7 @@ void PM_DrawBBox(vec3_t mins, vec3_t maxs, vec3_t origin, int pcolor, float life
 }
 
 
-#ifndef DEDICATED
+#if !DEDICATED
 
 /*
 ================
diff --git a/pm_shared/pm_defs.h b/pm_shared/pm_defs.h
index 82480806..7da29755 100644
--- a/pm_shared/pm_defs.h
+++ b/pm_shared/pm_defs.h
@@ -194,7 +194,7 @@ typedef struct playermove_s
 	int		(*PM_PointContents)( float *p, int *truecontents /*filled in if this is non-null*/ );
 	int		(*PM_TruePointContents)( float *p );
 	int		(*PM_HullPointContents)( struct hull_s *hull, int num, float *p );   
-#ifdef __MINGW32__
+#if __MINGW32__
 	pmtrace_t		*(*PM_PlayerTrace_real)( pmtrace_t * retvalue, float *start, float *end, int traceFlags, int ignore_pe );
 
 #else
@@ -218,7 +218,7 @@ typedef struct playermove_s
 	void		(*PM_PlaySound)( int channel, const char *sample, float volume, float attenuation, int fFlags, int pitch );
 	const char	*(*PM_TraceTexture)( int ground, float *vstart, float *vend );
 	void		(*PM_PlaybackEventFull)( int flags, int clientindex, unsigned short eventindex, float delay, float *origin, float *angles, float fparam1, float fparam2, int iparam1, int iparam2, int bparam1, int bparam2 );
-#ifdef __MINGW32__
+#if __MINGW32__
 	pmtrace_t		*(*PM_PlayerTraceEx_real) (pmtrace_t *retvalue, float *start, float *end, int traceFlags, int (*pfnIgnore)( physent_t *pe ));
 #else
 	pmtrace_t		(*PM_PlayerTraceEx) (float *start, float *end, int traceFlags, int (*pfnIgnore)( physent_t *pe ));
@@ -228,7 +228,7 @@ typedef struct playermove_s
 	struct msurface_s	*(*PM_TraceSurface)( int ground, float *vstart, float *vend );
 } playermove_t;
 
-#ifdef __MINGW32__
+#if __MINGW32__
 static pmtrace_t _pm_globalresult, _pm_globaltmp;
 	static inline pmtrace_t PM_PlayerTrace_wrap( float *start, float *end, int traceFlags, int ignore_pe, playermove_t *pmove )
 	{
diff --git a/pm_shared/pm_math.c b/pm_shared/pm_math.c
index 87c65d9f..f10e8a59 100644
--- a/pm_shared/pm_math.c
+++ b/pm_shared/pm_math.c
@@ -15,7 +15,7 @@
 // pm_math.c -- math primitives
 #include <math.h>
 #include "mathlib.h"
-#ifdef HAVE_TGMATH_H
+#if HAVE_TGMATH_H
 #include <tgmath.h>
 #endif
 #include "const.h"
@@ -27,7 +27,7 @@
 // fall over
 #define	ROLL	2 
 
-#ifdef _MSC_VER
+#if _MSC_VER
 #pragma warning(disable : 4244)
 #endif
 
diff --git a/pm_shared/pm_shared.c b/pm_shared/pm_shared.c
index 2352b51f..e16072de 100644
--- a/pm_shared/pm_shared.c
+++ b/pm_shared/pm_shared.c
@@ -20,7 +20,7 @@
 #include <stdlib.h> // atoi
 #include <ctype.h>  // isspace
 #include "mathlib.h"
-#ifdef HAVE_TGMATH_H
+#if HAVE_TGMATH_H
 #include <tgmath.h>
 #endif
 
@@ -33,7 +33,7 @@
 
 int g_bhopcap = 1;
 
-#ifdef CLIENT_DLL
+#if CLIENT_DLL
 // Spectator Mode
 int iJumpSpectator;
 extern float vJumpOrigin[3];
@@ -42,7 +42,7 @@ extern float vJumpAngles[3];
 
 static int pm_shared_initialized = 0;
 
-#ifdef _MSC_VER
+#if _MSC_VER
 #pragma warning( disable : 4305 )
 #endif
 
@@ -86,7 +86,7 @@ playermove_t *pmove = NULL;
 #define PLAYER_DUCKING_MULTIPLIER	0.333f
 
 // double to float warning
-#ifdef _MSC_VER
+#if _MSC_VER
 #pragma warning(disable : 4244)
 #endif
 
@@ -1798,7 +1798,7 @@ void PM_SpectatorMove( void )
 	
 	if( pmove->iuser1 == OBS_ROAMING )
 	{
-#ifdef CLIENT_DLL
+#if CLIENT_DLL
 		// jump only in roaming mode
 		if( iJumpSpectator )
 		{
diff --git a/wscript b/wscript
index 62279ae8..ded363dd 100644
--- a/wscript
+++ b/wscript
@@ -256,8 +256,8 @@ def configure(conf):
 	conf.define_cond('HAVE_CMATH', cmath_usable)
 
 	if conf.env.COMPILER_CC == 'msvc':
-		conf.define('_CRT_SECURE_NO_WARNINGS', 1)
-		conf.define('_CRT_NONSTDC_NO_DEPRECATE', 1)
+		conf.define('_CRT_SECURE_NO_WARNINGS', True)
+		conf.define('_CRT_NONSTDC_NO_DEPRECATE', True)
 	elif conf.env.COMPILER_CC == 'owcc':
 		pass
 	else:
@@ -271,14 +271,14 @@ def configure(conf):
 		if conf.env.cxxshlib_PATTERN.startswith('lib'):
 			conf.env.cxxshlib_PATTERN = conf.env.cxxshlib_PATTERN[3:]
 
-	conf.define('CLIENT_WEAPONS', '1')
+	conf.define('BARNACLE_FIX_VISIBILITY', False)
+	conf.define('CLIENT_WEAPONS', True)
 	conf.define('CROWBAR_IDLE_ANIM', False)
 	conf.define('CROWBAR_DELAY_FIX', False)
 	conf.define('CROWBAR_FIX_RAPID_CROWBAR', False)
 	conf.define('GAUSS_OVERCHARGE_FIX', False)
-
-	if conf.env.DEST_OS == 'android' or conf.options.ENABLE_MOD_HACKS:
-		conf.define('MOBILE_HACKS', '1')
+	conf.define('OEM_BUILD', False)
+	conf.define('HLDEMO_BUILD', False)
 
 	conf.add_subproject(["cl_dll", "dlls"])