Half - Life 2: Instagib has very similar gameplay to that of Quake 3 Rail Gun fights; but in the Source Engine style. It brings fast paced one-hit rail gun fights into the Source Engine; with a selection of two main weapons. The well known RailGun and the RailEnforcer. The RailGun is a plasma based pistol with unlimited energy; but it has a delay between each shot. The RailEnforcer is a plasma based shotgun that holds 3 shots per plasma shell that can all be fired simutaniously. Both weapons kill instantly. The whole engine has been tweaked to perfection for Instagib Gameplay; right down to the physics, blood effects and impentation of the Logitech G15 SDK.