This is a first-person shooter in which players assume the role of an elite military unit tasked with protecting America from an enemy threat. Players complete mission objectives and engage in battles across a variety of international locations (e.g., United States, South America, Antarctica). Players use pistols, machine guns, rocket launchers, and explosives to kill enemy soldiers in frenetic combat. Battles are accompanied by realistic gunfire, screams of pain, and frequent explosions. Players can also perform close-up attacks (e.g., neck stabbings, headshots) to eliminate enemies. Large blood-splatter effects are frequently depicted; bloodstains appear on the ground. Cutscenes also depict intense acts of violence: a bound soldier shot in the chest; characters executed at close range; civilians gunned down in a space station. During the course of the game, players can select emblems from a menu screen for character customization; a few emblems are suggestive of marijuana. The words “f**k,” “sh*t,” and “a*shole” can be heard in the dialogue.