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diff --git a/game/server/hl2/npc_combines.cpp b/game/server/hl2/npc_combines.cpp
new file mode 100644
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+++ b/game/server/hl2/npc_combines.cpp
@@ -0,0 +1,431 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: This is the soldier version of the combine, analogous to the HL1 grunt.
+//
+//=============================================================================//
+
+#include "cbase.h"
+#include "ai_hull.h"
+#include "ai_motor.h"
+#include "npc_combines.h"
+#include "bitstring.h"
+#include "engine/IEngineSound.h"
+#include "soundent.h"
+#include "ndebugoverlay.h"
+#include "npcevent.h"
+#include "hl2/hl2_player.h"
+#include "game.h"
+#include "ammodef.h"
+#include "explode.h"
+#include "ai_memory.h"
+#include "Sprite.h"
+#include "soundenvelope.h"
+#include "weapon_physcannon.h"
+#include "hl2_gamerules.h"
+#include "gameweaponmanager.h"
+#include "vehicle_base.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+ConVar	sk_combine_s_health( "sk_combine_s_health","0");
+ConVar	sk_combine_s_kick( "sk_combine_s_kick","0");
+
+ConVar sk_combine_guard_health( "sk_combine_guard_health", "0");
+ConVar sk_combine_guard_kick( "sk_combine_guard_kick", "0");
+ 
+// Whether or not the combine guard should spawn health on death
+ConVar combine_guard_spawn_health( "combine_guard_spawn_health", "1" );
+
+extern ConVar sk_plr_dmg_buckshot;	
+extern ConVar sk_plr_num_shotgun_pellets;
+
+//Whether or not the combine should spawn health on death
+ConVar	combine_spawn_health( "combine_spawn_health", "1" );
+
+LINK_ENTITY_TO_CLASS( npc_combine_s, CNPC_CombineS );
+
+
+#define AE_SOLDIER_BLOCK_PHYSICS		20 // trying to block an incoming physics object
+
+extern Activity ACT_WALK_EASY;
+extern Activity ACT_WALK_MARCH;
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CNPC_CombineS::Spawn( void )
+{
+	Precache();
+	SetModel( STRING( GetModelName() ) );
+
+	if( IsElite() )
+	{
+		// Stronger, tougher.
+		SetHealth( sk_combine_guard_health.GetFloat() );
+		SetMaxHealth( sk_combine_guard_health.GetFloat() );
+		SetKickDamage( sk_combine_guard_kick.GetFloat() );
+	}
+	else
+	{
+		SetHealth( sk_combine_s_health.GetFloat() );
+		SetMaxHealth( sk_combine_s_health.GetFloat() );
+		SetKickDamage( sk_combine_s_kick.GetFloat() );
+	}
+
+	CapabilitiesAdd( bits_CAP_ANIMATEDFACE );
+	CapabilitiesAdd( bits_CAP_MOVE_SHOOT );
+	CapabilitiesAdd( bits_CAP_DOORS_GROUP );
+
+	BaseClass::Spawn();
+
+#if HL2_EPISODIC
+	if (m_iUseMarch && !HasSpawnFlags(SF_NPC_START_EFFICIENT))
+	{
+		Msg( "Soldier %s is set to use march anim, but is not an efficient AI. The blended march anim can only be used for dead-ahead walks!\n", GetDebugName() );
+	}
+#endif
+}
+
+//-----------------------------------------------------------------------------
+// Purpose:
+// Input  :
+// Output :
+//-----------------------------------------------------------------------------
+void CNPC_CombineS::Precache()
+{
+	const char *pModelName = STRING( GetModelName() );
+
+	if( !Q_stricmp( pModelName, "models/combine_super_soldier.mdl" ) )
+	{
+		m_fIsElite = true;
+	}
+	else
+	{
+		m_fIsElite = false;
+	}
+
+	if( !GetModelName() )
+	{
+		SetModelName( MAKE_STRING( "models/combine_soldier.mdl" ) );
+	}
+
+	PrecacheModel( STRING( GetModelName() ) );
+
+	UTIL_PrecacheOther( "item_healthvial" );
+	UTIL_PrecacheOther( "weapon_frag" );
+	UTIL_PrecacheOther( "item_ammo_ar2_altfire" );
+
+	BaseClass::Precache();
+}
+
+
+void CNPC_CombineS::DeathSound( const CTakeDamageInfo &info )
+{
+	// NOTE: The response system deals with this at the moment
+	if ( GetFlags() & FL_DISSOLVING )
+		return;
+
+	GetSentences()->Speak( "COMBINE_DIE", SENTENCE_PRIORITY_INVALID, SENTENCE_CRITERIA_ALWAYS ); 
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Soldiers use CAN_RANGE_ATTACK2 to indicate whether they can throw
+//			a grenade. Because they check only every half-second or so, this
+//			condition must persist until it is updated again by the code
+//			that determines whether a grenade can be thrown, so prevent the 
+//			base class from clearing it out. (sjb)
+//-----------------------------------------------------------------------------
+void CNPC_CombineS::ClearAttackConditions( )
+{
+	bool fCanRangeAttack2 = HasCondition( COND_CAN_RANGE_ATTACK2 );
+
+	// Call the base class.
+	BaseClass::ClearAttackConditions();
+
+	if( fCanRangeAttack2 )
+	{
+		// We don't allow the base class to clear this condition because we
+		// don't sense for it every frame.
+		SetCondition( COND_CAN_RANGE_ATTACK2 );
+	}
+}
+
+void CNPC_CombineS::PrescheduleThink( void )
+{
+	/*//FIXME: This doesn't need to be in here, it's all debug info
+	if( HasCondition( COND_HEAR_PHYSICS_DANGER ) )
+	{
+		// Don't react unless we see the item!!
+		CSound *pSound = NULL;
+
+		pSound = GetLoudestSoundOfType( SOUND_PHYSICS_DANGER );
+
+		if( pSound )
+		{
+			if( FInViewCone( pSound->GetSoundReactOrigin() ) )
+			{
+				DevMsg( "OH CRAP!\n" );
+				NDebugOverlay::Line( EyePosition(), pSound->GetSoundReactOrigin(), 0, 0, 255, false, 2.0f );
+			}
+		}
+	}
+	*/
+
+	BaseClass::PrescheduleThink();
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Allows for modification of the interrupt mask for the current schedule.
+//			In the most cases the base implementation should be called first.
+//-----------------------------------------------------------------------------
+void CNPC_CombineS::BuildScheduleTestBits( void )
+{
+	//Interrupt any schedule with physics danger (as long as I'm not moving or already trying to block)
+	if ( m_flGroundSpeed == 0.0 && !IsCurSchedule( SCHED_FLINCH_PHYSICS ) )
+	{
+		SetCustomInterruptCondition( COND_HEAR_PHYSICS_DANGER );
+	}
+
+	BaseClass::BuildScheduleTestBits();
+}
+
+//-----------------------------------------------------------------------------
+// Purpose:
+// Input  :
+// Output :
+//-----------------------------------------------------------------------------
+int CNPC_CombineS::SelectSchedule ( void )
+{
+	return BaseClass::SelectSchedule();
+}
+
+//-----------------------------------------------------------------------------
+//-----------------------------------------------------------------------------
+float CNPC_CombineS::GetHitgroupDamageMultiplier( int iHitGroup, const CTakeDamageInfo &info )
+{
+	switch( iHitGroup )
+	{
+	case HITGROUP_HEAD:
+		{
+			// Soldiers take double headshot damage
+			return 2.0f;
+		}
+	}
+
+	return BaseClass::GetHitgroupDamageMultiplier( iHitGroup, info );
+}
+
+
+//-----------------------------------------------------------------------------
+//-----------------------------------------------------------------------------
+void CNPC_CombineS::HandleAnimEvent( animevent_t *pEvent )
+{
+	switch( pEvent->event )
+	{
+	case AE_SOLDIER_BLOCK_PHYSICS:
+		DevMsg( "BLOCKING!\n" );
+		m_fIsBlocking = true;
+		break;
+
+	default:
+		BaseClass::HandleAnimEvent( pEvent );
+		break;
+	}
+}
+
+void CNPC_CombineS::OnChangeActivity( Activity eNewActivity )
+{
+	// Any new sequence stops us blocking.
+	m_fIsBlocking = false;
+
+	BaseClass::OnChangeActivity( eNewActivity );
+
+#if HL2_EPISODIC
+	// Give each trooper a varied look for his march. Done here because if you do it earlier (eg Spawn, StartTask), the
+	// pose param gets overwritten.
+	if (m_iUseMarch)
+	{
+		SetPoseParameter("casual", RandomFloat());
+	}
+#endif
+}
+
+void CNPC_CombineS::OnListened()
+{
+	BaseClass::OnListened();
+
+	if ( HasCondition( COND_HEAR_DANGER ) && HasCondition( COND_HEAR_PHYSICS_DANGER ) )
+	{
+		if ( HasInterruptCondition( COND_HEAR_DANGER ) )
+		{
+			ClearCondition( COND_HEAR_PHYSICS_DANGER );
+		}
+	}
+
+	// debugging to find missed schedules
+#if 0
+	if ( HasCondition( COND_HEAR_DANGER ) && !HasInterruptCondition( COND_HEAR_DANGER ) )
+	{
+		DevMsg("Ignore danger in %s\n", GetCurSchedule()->GetName() );
+	}
+#endif
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : &info - 
+// Output : Returns true on success, false on failure.
+//-----------------------------------------------------------------------------
+void CNPC_CombineS::Event_Killed( const CTakeDamageInfo &info )
+{
+	// Don't bother if we've been told not to, or the player has a megaphyscannon
+	if ( combine_spawn_health.GetBool() == false || PlayerHasMegaPhysCannon() )
+	{
+		BaseClass::Event_Killed( info );
+		return;
+	}
+
+	CBasePlayer *pPlayer = ToBasePlayer( info.GetAttacker() );
+
+	if ( !pPlayer )
+	{
+		CPropVehicleDriveable *pVehicle = dynamic_cast<CPropVehicleDriveable *>( info.GetAttacker() ) ;
+		if ( pVehicle && pVehicle->GetDriver() && pVehicle->GetDriver()->IsPlayer() )
+		{
+			pPlayer = assert_cast<CBasePlayer *>( pVehicle->GetDriver() );
+		}
+	}
+
+	if ( pPlayer != NULL )
+	{
+		// Elites drop alt-fire ammo, so long as they weren't killed by dissolving.
+		if( IsElite() )
+		{
+#ifdef HL2_EPISODIC
+			if ( HasSpawnFlags( SF_COMBINE_NO_AR2DROP ) == false )
+#endif
+			{
+				CBaseEntity *pItem = DropItem( "item_ammo_ar2_altfire", WorldSpaceCenter()+RandomVector(-4,4), RandomAngle(0,360) );
+
+				if ( pItem )
+				{
+					IPhysicsObject *pObj = pItem->VPhysicsGetObject();
+
+					if ( pObj )
+					{
+						Vector			vel		= RandomVector( -64.0f, 64.0f );
+						AngularImpulse	angImp	= RandomAngularImpulse( -300.0f, 300.0f );
+
+						vel[2] = 0.0f;
+						pObj->AddVelocity( &vel, &angImp );
+					}
+
+					if( info.GetDamageType() & DMG_DISSOLVE )
+					{
+						CBaseAnimating *pAnimating = dynamic_cast<CBaseAnimating*>(pItem);
+
+						if( pAnimating )
+						{
+							pAnimating->Dissolve( NULL, gpGlobals->curtime, false, ENTITY_DISSOLVE_NORMAL );
+						}
+					}
+					else
+					{
+						WeaponManager_AddManaged( pItem );
+					}
+				}
+			}
+		}
+
+		CHalfLife2 *pHL2GameRules = static_cast<CHalfLife2 *>(g_pGameRules);
+
+		// Attempt to drop health
+		if ( pHL2GameRules->NPC_ShouldDropHealth( pPlayer ) )
+		{
+			DropItem( "item_healthvial", WorldSpaceCenter()+RandomVector(-4,4), RandomAngle(0,360) );
+			pHL2GameRules->NPC_DroppedHealth();
+		}
+		
+		if ( HasSpawnFlags( SF_COMBINE_NO_GRENADEDROP ) == false )
+		{
+			// Attempt to drop a grenade
+			if ( pHL2GameRules->NPC_ShouldDropGrenade( pPlayer ) )
+			{
+				DropItem( "weapon_frag", WorldSpaceCenter()+RandomVector(-4,4), RandomAngle(0,360) );
+				pHL2GameRules->NPC_DroppedGrenade();
+			}
+		}
+	}
+
+	BaseClass::Event_Killed( info );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : &info - 
+// Output : Returns true on success, false on failure.
+//-----------------------------------------------------------------------------
+bool CNPC_CombineS::IsLightDamage( const CTakeDamageInfo &info )
+{
+	return BaseClass::IsLightDamage( info );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : &info - 
+// Output : Returns true on success, false on failure.
+//-----------------------------------------------------------------------------
+bool CNPC_CombineS::IsHeavyDamage( const CTakeDamageInfo &info )
+{
+	// Combine considers AR2 fire to be heavy damage
+	if ( info.GetAmmoType() == GetAmmoDef()->Index("AR2") )
+		return true;
+
+	// 357 rounds are heavy damage
+	if ( info.GetAmmoType() == GetAmmoDef()->Index("357") )
+		return true;
+
+	// Shotgun blasts where at least half the pellets hit me are heavy damage
+	if ( info.GetDamageType() & DMG_BUCKSHOT )
+	{
+		int iHalfMax = sk_plr_dmg_buckshot.GetFloat() * sk_plr_num_shotgun_pellets.GetInt() * 0.5;
+		if ( info.GetDamage() >= iHalfMax )
+			return true;
+	}
+
+	// Rollermine shocks
+	if( (info.GetDamageType() & DMG_SHOCK) && hl2_episodic.GetBool() )
+	{
+		return true;
+	}
+
+	return BaseClass::IsHeavyDamage( info );
+}
+
+#if HL2_EPISODIC
+//-----------------------------------------------------------------------------
+// Purpose: Translate base class activities into combot activites
+//-----------------------------------------------------------------------------
+Activity CNPC_CombineS::NPC_TranslateActivity( Activity eNewActivity )
+{
+	// If the special ep2_outland_05 "use march" flag is set, use the more casual marching anim.
+	if ( m_iUseMarch && eNewActivity == ACT_WALK )
+	{
+		eNewActivity = ACT_WALK_MARCH;
+	}
+
+	return BaseClass::NPC_TranslateActivity( eNewActivity );
+}
+
+
+//---------------------------------------------------------
+// Save/Restore
+//---------------------------------------------------------
+BEGIN_DATADESC( CNPC_CombineS )
+
+	DEFINE_KEYFIELD( m_iUseMarch, FIELD_INTEGER, "usemarch" ),
+
+END_DATADESC()
+#endif
\ No newline at end of file