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diff --git a/game/client/dod/c_grenadetrail.h b/game/client/dod/c_grenadetrail.h
new file mode 100644
index 0000000..f0b37da
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+++ b/game/client/dod/c_grenadetrail.h
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//
+//=============================================================================//
+// This defines the client-side SmokeTrail entity. It can also be used without
+// an entity, in which case you must pass calls to it and set its position each frame.
+
+#ifndef PARTICLE_SMOKETRAIL_H
+#define PARTICLE_SMOKETRAIL_H
+
+#include "particlemgr.h"
+#include "particle_prototype.h"
+#include "particle_util.h"
+#include "particles_simple.h"
+#include "c_baseentity.h"
+#include "baseparticleentity.h"
+
+#include "fx_trail.h"
+
+//
+// Smoke Trail
+//
+
+class C_GrenadeTrail : public C_BaseParticleEntity, public IPrototypeAppEffect
+{
+public:
+	DECLARE_CLASS( C_GrenadeTrail, C_BaseParticleEntity );
+	DECLARE_CLIENTCLASS();
+	
+					C_GrenadeTrail();
+	virtual			~C_GrenadeTrail();
+
+public:
+
+	//For attachments
+	void			GetAimEntOrigin( IClientEntity *pAttachedTo, Vector *pAbsOrigin, QAngle *pAbsAngles );
+
+	// Enable/disable emission.
+	void			SetEmit(bool bEmit);
+
+	// Change the spawn rate.
+	void			SetSpawnRate(float rate);
+
+// C_BaseEntity.
+public:
+	virtual	void	OnDataChanged(DataUpdateType_t updateType);
+
+// IPrototypeAppEffect.
+public:
+	virtual void	Start(CParticleMgr *pParticleMgr, IPrototypeArgAccess *pArgs);
+
+// IParticleEffect.
+public:
+	virtual void	Update(float fTimeDelta);
+	virtual void RenderParticles( CParticleRenderIterator *pIterator );
+	virtual void SimulateParticles( CParticleSimulateIterator *pIterator );
+
+
+public:
+	// Effect parameters. These will assume default values but you can change them.
+	float			m_SpawnRate;			// How many particles per second.
+
+	Vector			m_StartColor;			// Fade between these colors.
+	Vector			m_EndColor;
+	float			m_Opacity;
+
+	float			m_ParticleLifetime;		// How long do the particles live?
+	float			m_StopEmitTime;			// When do I stop emitting particles? (-1 = never)
+	
+	float			m_MinSpeed;				// Speed range.
+	float			m_MaxSpeed;
+	
+	float			m_MinDirectedSpeed;		// Directed speed range.
+	float			m_MaxDirectedSpeed;
+
+	float			m_StartSize;			// Size ramp.
+	float			m_EndSize;
+
+	float			m_SpawnRadius;
+
+	Vector			m_VelocityOffset;		// Emit the particles in a certain direction.
+
+	bool			m_bEmit;				// Keep emitting particles?
+
+	int				m_nAttachment;
+
+private:
+	PMaterialHandle	m_MaterialHandle[2];
+	TimedEvent		m_ParticleSpawn;
+
+	CParticleMgr	*m_pParticleMgr;
+	CSmartPtr<CSimpleEmitter> m_pSmokeEmitter;
+
+	C_GrenadeTrail( const C_GrenadeTrail & );
+};
+
+#endif //PARTICLE_SMOKETRAIL_H
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