diff --git a/game/client/particlemgr.cpp b/game/client/particlemgr.cpp
index a82ff1f5..c880a415 100644
--- a/game/client/particlemgr.cpp
+++ b/game/client/particlemgr.cpp
@@ -1014,7 +1014,7 @@ bool CParticleEffectBinding::RecalculateBoundingBox()
 CEffectMaterial* CParticleEffectBinding::GetEffectMaterial( CParticleSubTexture *pSubTexture )
 {
 	// Hash the IMaterial pointer.
-	unsigned int index = (((intp)pSubTexture->m_pGroup) >> 6) % EFFECT_MATERIAL_HASH_SIZE;
+	unsigned int index = (((uintp)pSubTexture->m_pGroup) >> 6) % EFFECT_MATERIAL_HASH_SIZE;
 	for ( CEffectMaterial *pCur=m_EffectMaterialHash[index]; pCur; pCur = pCur->m_pHashedNext )
 	{
 		if ( pCur->m_pGroup == pSubTexture->m_pGroup )
diff --git a/game/server/hl2/npc_playercompanion.cpp b/game/server/hl2/npc_playercompanion.cpp
index a03a752f..91217b7f 100644
--- a/game/server/hl2/npc_playercompanion.cpp
+++ b/game/server/hl2/npc_playercompanion.cpp
@@ -3538,7 +3538,7 @@ void CNPC_PlayerCompanion::InputClearAllOuputs( inputdata_t &inputdata )
 			typedescription_t *dataDesc = &dmap->dataDesc[i];
 			if ( ( dataDesc->fieldType == FIELD_CUSTOM ) && ( dataDesc->flags & FTYPEDESC_OUTPUT ) )
 			{
-				CBaseEntityOutput *pOutput = (CBaseEntityOutput *)((int)this + (int)dataDesc->fieldOffset[0]);
+				CBaseEntityOutput *pOutput = (CBaseEntityOutput *)((intp)this + (intp)dataDesc->fieldOffset[0]);
 				pOutput->DeleteAllElements();
 				/*
 				int nConnections = pOutput->NumberOfElements();
diff --git a/game/server/portal/portal_player.cpp b/game/server/portal/portal_player.cpp
index a72e2e94..15dd2504 100644
--- a/game/server/portal/portal_player.cpp
+++ b/game/server/portal/portal_player.cpp
@@ -556,7 +556,7 @@ void CPortal_Player::UpdateExpression( void )
 		return;
 	}
 
-	char const szScene[256];
+	char szScene[256] = { 0 };
 	response->GetResponse( szScene, sizeof(szScene) );
 
 	// Ignore updates that choose the same scene
diff --git a/game/shared/hl2/survival_gamerules.cpp b/game/shared/hl2/survival_gamerules.cpp
index 723eeeac..f8711c51 100644
--- a/game/shared/hl2/survival_gamerules.cpp
+++ b/game/shared/hl2/survival_gamerules.cpp
@@ -207,7 +207,7 @@ void CHalfLife2Survival::ParseSurvivalSettings( KeyValues *pSubKey )
 		}
 		else if ( !stricmp( pTestKey->GetName(), "spawnhealth" ) )
 		{
-			m_SurvivalSettings.m_iSpawnHealth = pTestKey->GetInt( NULL, 100 );
+			m_SurvivalSettings.m_iSpawnHealth = pTestKey->GetInt( 0, 100 );
 		}
 		else if ( !stricmp( pTestKey->GetName(), "allowedpickups" ) )
 		{
@@ -270,4 +270,4 @@ void CHalfLife2Survival::CreateStandardEntities( void )
 
 #endif
 
-#endif
\ No newline at end of file
+#endif
diff --git a/game/shared/portal/portal_gamerules.cpp b/game/shared/portal/portal_gamerules.cpp
index 3143d2b6..0f238d2a 100644
--- a/game/shared/portal/portal_gamerules.cpp
+++ b/game/shared/portal/portal_gamerules.cpp
@@ -1265,7 +1265,7 @@ CAmmoDef *GetAmmoDef()
 		def.AddAmmoType("Grenade",			DMG_BURN,					TRACER_NONE,			"sk_plr_dmg_grenade",		"sk_npc_dmg_grenade",		"sk_max_grenade",		0, 0);
 		def.AddAmmoType("Thumper",			DMG_SONIC,					TRACER_NONE,			10, 10, 2, 0, 0 );
 		def.AddAmmoType("Gravity",			DMG_CLUB,					TRACER_NONE,			0,	0, 8, 0, 0 );
-		def.AddAmmoType("Battery",			DMG_CLUB,					TRACER_NONE,			NULL, NULL, NULL, 0, 0 );
+		def.AddAmmoType("Battery",			DMG_CLUB,					TRACER_NONE,			0, 0, 0, 0, 0 );
 		def.AddAmmoType("GaussEnergy",		DMG_SHOCK,					TRACER_NONE,			"sk_jeep_gauss_damage",		"sk_jeep_gauss_damage", "sk_max_gauss_round", BULLET_IMPULSE(650, 8000), 0 ); // hit like a 10kg weight at 400 in/s
 		def.AddAmmoType("CombineCannon",	DMG_BULLET,					TRACER_LINE,			"sk_npc_dmg_gunship_to_plr", "sk_npc_dmg_gunship", NULL, 1.5 * 750 * 12, 0 ); // hit like a 1.5kg weight at 750 ft/s
 		def.AddAmmoType("AirboatGun",		DMG_AIRBOAT,				TRACER_LINE,			"sk_plr_dmg_airboat",		"sk_npc_dmg_airboat",		NULL,					BULLET_IMPULSE(10, 600), 0 );