This is a third-person shooter in which players assume the role of a federal agent (Aya) who uses her special abilities to battle an alien invasion. Players use machine guns, pistols, shotguns, and explosives to attack and kill alien creatures (i.e., 'the Twisted'). Battles are accompanied by realistic gunfire, explosions, and screams of pain; enemies generally explode and disappear when defeated. Several cutscenes contain large pools or splashes of blood; in one sequence, slow-motion blood droplets fall over a crowd as multiple characters are killed at once. Aya's character can change into a variety of outfits (e.g., lingerie bunny costume, short skirts, bikini tops); when she is injured, her clothes also take damage and reveal large amounts of cleavage/buttocks. One unlockable video depicts Aya in the shower, with her breasts and buttocks partially obscured by steam and varied camera angles. The words 'f**k' and 'sh*t' appear in the dialogue.