High Quality Content by WIKIPEDIA articles! Shooter games (also known as `shoot em up` games) are a sub-genre of action game, which often test the player`s speed and reaction time. It includes many subgenres that have the commonality of focusing "on the actions of the avatar using some sort of weapon. Usually this weapon is a gun, or some other long-range weapon". A common resource found in many shooter games is ammunition. Most commonly, the purpose of a shooter game is to shoot opponents and proceed through missions without the player character dying.