Player characters are equipped with submachine guns in this game, as opposed to semiautomatic pistols in the first two or shotguns in the third. The gun will fire in fully automatic mode as long as the trigger is depressed, and can be reloaded by shaking it or pointing away from the screen. Players can also find and throw grenades to destroy large numbers of enemies at once. Additional grenades can be earned by completing certain tasks or by shooting crates. At some points in the game, players are required to shake the gun vigorously in order to escape certain situations.