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diff --git a/game/shared/IEffects.h b/game/shared/IEffects.h
new file mode 100644
index 0000000..e405154
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+++ b/game/shared/IEffects.h
@@ -0,0 +1,82 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: Client-server neutral effects interface
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef IEFFECTS_H
+#define IEFFECTS_H
+
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "basetypes.h"
+#include "mathlib/vector.h"
+#include "interface.h"
+#include "ipredictionsystem.h"
+
+//-----------------------------------------------------------------------------
+// Forward declarations
+//-----------------------------------------------------------------------------
+enum ShakeCommand_t;
+class Vector;
+class CGameTrace;
+typedef CGameTrace trace_t;
+
+
+//-----------------------------------------------------------------------------
+// Client-server neutral effects interface
+//-----------------------------------------------------------------------------
+#define IEFFECTS_INTERFACE_VERSION	"IEffects001"
+abstract_class IEffects : public IPredictionSystem
+{
+public:
+	//
+	// Particle effects
+	//
+	virtual void Beam( const Vector &Start, const Vector &End, int nModelIndex, 
+		int nHaloIndex, unsigned char frameStart, unsigned char frameRate,
+		float flLife, unsigned char width, unsigned char endWidth, unsigned char fadeLength, 
+		unsigned char noise, unsigned char red, unsigned char green,
+		unsigned char blue, unsigned char brightness, unsigned char speed) = 0;
+
+	//-----------------------------------------------------------------------------
+	// Purpose: Emits smoke sprites.
+	// Input  : origin - Where to emit the sprites.
+	//			scale - Sprite scale * 10.
+	//			framerate - Framerate at which to animate the smoke sprites.
+	//-----------------------------------------------------------------------------
+	virtual void Smoke( const Vector &origin, int modelIndex, float scale, float framerate ) = 0;
+
+	virtual void Sparks( const Vector &position, int nMagnitude = 1, int nTrailLength = 1, const Vector *pvecDir = NULL ) = 0;
+
+	virtual void Dust( const Vector &pos, const Vector &dir, float size, float speed ) = 0;
+
+	virtual void MuzzleFlash( const Vector &vecOrigin, const QAngle &vecAngles, float flScale, int iType ) = 0;
+
+	// like ricochet, but no sound
+	virtual void MetalSparks( const Vector &position, const Vector &direction ) = 0; 
+
+	virtual void EnergySplash( const Vector &position, const Vector &direction, bool bExplosive = false ) = 0;
+
+	virtual void Ricochet( const Vector &position, const Vector &direction ) = 0;
+
+	// FIXME: Should these methods remain in this interface? Or go in some 
+	// other client-server neutral interface?
+	virtual float Time() = 0;
+	virtual bool IsServer() = 0;
+
+	// Used by the playback system to suppress sounds
+	virtual void SuppressEffectsSounds( bool bSuppress ) = 0;
+};
+
+
+//-----------------------------------------------------------------------------
+// Client-server neutral effects interface accessor
+//-----------------------------------------------------------------------------
+extern IEffects *g_pEffects;
+			   
+
+#endif // IEFFECTS_H