This is a third-person shooter in which players assume the role of two counter-terrorism operatives attempting to stop a bio-terrorist plot. Players use handguns, rifles, machine guns, and rocket launchers to kill hordes of zombies and mutated creatures. Battles are highlighted by screams of pain and realistic gunfire; enemies collapse to the ground when killed, dissolving into pools of blood and chunks of flesh. Blood-splatter effects occur when humans or zombies are attacked, and some characters are depicted with exposed organs/viscera. In one level, a human character is seen getting sliced by a chainsaw as she struggles in the air; in another, a corpse with a mutilated face is depicted hanging against a wall. The word "sh*t" appears in the dialogue.
source: esrb