South Park: The Stick of Truth - Too Far Achievement

Achievement - Too Far
You farted on the corpse of an aborted Nazi Zombie fetus.
**This is a Missable Achievement **

This must be gotten when the main story quest takes you into Unplanned Parenthood. After you fight a Nazi Zombie fetus (or kill it with the environment), make sure to fart on its corpse before proceeding, to unlock the achievement.