South Park: The Stick of Truth - Stick Savior Achievement

Achievement - Stick Savior
You defeated Princess Kenny and recovered the Stick of Truth.

Story-related. Cannot be missed.

You'll get this after you beat the game. Defeating Princess Kenny is a long battle that involves fighting Kenny 4 times, so make sure you have plenty of potions. This is the last battle, so don't hesitate to use Speed Potions to get in extra attacks each turn, but remember that your potions need to last across four sets of health on Kenny.