Shooters are a genre of computer games. Their main feature is the use of weapons to hit targets, usually other game characters resp. human opponents. The most common form are 3D First Person Shooter and the Third Person Shooter. Other variations do exist, too, such as 2D shooters or vehicular combat games. Among the more prominent titles of this genre are for instance Call of Duty, Unreal Tournament 2004 or Counter-Strike.