This is a survival horror game in which players assume the role of one of two protagonists who must stop the spread of a virus. Players kill humanoid monsters – they are zombie-like and infected with a parasite – by using guns, rifles, and machine guns, while solving puzzles and collecting items to complete the game. In most game modes, players are rewarded with items or points for the number of kills they perform. Red blood spray is depicted when the monsters are shot, while heads, arms, and legs that get blown off can quickly regenerate. Some enemies are able to mutilate and/or decapitate characters' heads with an assortment of swords, chainsaws, and claws. The dialogue contains strong profanity (e.g., "f*ck,""sh*t," and "b*tch"), particularly during cutscenes.