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diff --git a/game/server/ai_tacticalservices.h b/game/server/ai_tacticalservices.h
new file mode 100644
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+++ b/game/server/ai_tacticalservices.h
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+//=============================================================================
+
+#ifndef AI_TACTICALSERVICES_H
+#define AI_TACTICALSERVICES_H
+
+#include "ai_component.h"
+
+#if defined( _WIN32 )
+#pragma once
+#endif
+
+class CAI_Network;
+class CAI_Pathfinder;
+
+
+enum FlankType_t
+{
+	FLANKTYPE_NONE = 0,
+	FLANKTYPE_ARC,			// Stay flFlankParam degrees of arc away from vecFlankRefPos
+	FLANKTYPE_RADIUS,		// Stay flFlankParam units away from vecFlankRefPos
+};
+
+
+//-----------------------------------------------------------------------------
+
+class CAI_TacticalServices : public CAI_Component
+{
+public:
+	CAI_TacticalServices( CAI_BaseNPC *pOuter )
+	 :	CAI_Component(pOuter),
+		m_pNetwork( NULL )
+	{
+		m_bAllowFindLateralLos = true;
+	}
+	
+	void Init( CAI_Network *pNetwork );
+
+	bool			FindLos( const Vector &threatPos, const Vector &threatEyePos, float minThreatDist, float maxThreatDist, float blockTime, Vector *pResult );
+	bool			FindLos( const Vector &threatPos, const Vector &threatEyePos, float minThreatDist, float maxThreatDist, float blockTime, FlankType_t eFlankType, const Vector &VecFlankRefPos, float flFlankParam, Vector *pResult );
+	bool			FindLateralLos( const Vector &threatPos, Vector *pResult );
+	bool			FindBackAwayPos( const Vector &vecThreat, Vector *pResult );
+	bool			FindCoverPos( const Vector &vThreatPos, const Vector &vThreatEyePos, float flMinDist, float flMaxDist, Vector *pResult );
+	bool			FindCoverPos( const Vector &vNearPos, const Vector &vThreatPos, const Vector &vThreatEyePos, float flMinDist, float flMaxDist, Vector *pResult );
+	bool			FindLateralCover( const Vector &vecThreat, float flMinDist, Vector *pResult );
+	bool			FindLateralCover( const Vector &vecThreat, float flMinDist, float distToCheck, int numChecksPerDir, Vector *pResult );
+	bool			FindLateralCover( const Vector &vNearPos, const Vector &vecThreat, float flMinDist, float distToCheck, int numChecksPerDir, Vector *pResult );
+
+	void			AllowFindLateralLos( bool bAllow ) { m_bAllowFindLateralLos = bAllow; }
+
+private:
+	// Checks lateral cover
+	bool			TestLateralCover( const Vector &vecCheckStart, const Vector &vecCheckEnd, float flMinDist );
+	bool			TestLateralLos( const Vector &vecCheckStart, const Vector &vecCheckEnd );
+
+	int				FindBackAwayNode( const Vector &vecThreat );
+	int				FindCoverNode( const Vector &vThreatPos, const Vector &vThreatEyePos, float flMinDist, float flMaxDist );
+	int				FindCoverNode( const Vector &vNearPos, const Vector &vThreatPos, const Vector &vThreatEyePos, float flMinDist, float flMaxDist );
+	int				FindLosNode( const Vector &vThreatPos, const Vector &vThreatEyePos, float flMinThreatDist, float flMaxThreatDist, float flBlockTime, FlankType_t eFlankType, const Vector &vThreatFacing, float flFlankParam );
+	
+	Vector			GetNodePos( int );
+
+	CAI_Network *GetNetwork()				{ return m_pNetwork; }
+	const CAI_Network *GetNetwork() const	{ return m_pNetwork; }
+
+	CAI_Pathfinder *GetPathfinder()				{ return m_pPathfinder; }
+	const CAI_Pathfinder *GetPathfinder() const	{ return m_pPathfinder; }
+	
+	CAI_Network *m_pNetwork;
+	CAI_Pathfinder *m_pPathfinder;
+
+	bool	m_bAllowFindLateralLos;	// Allows us to turn Lateral LOS checking on/off. 
+
+	DECLARE_SIMPLE_DATADESC();
+};
+
+//-----------------------------------------------------------------------------
+
+#endif // AI_TACTICALSERVICES_H