Here is the full list of all 50 South Park: The Stick of Truth achievements worth 1,000 gamerscore.
In three separate battles, you've taken a shit in your pants.
You accepted your fate and chose the name Douchebag yourself.
While inside Mr. Slave, you summoned Mr. Slave.
You opened all of the garages in South Park.
You collected 15 Chinpokomon.
You've spent $500.
You have collected half of the available costume sets.
You made friends with half of South Park.
You defeated 20 enemies using Cartman's Ass.
You collected 5 Chinpokomon.
You defeated Princess Kenny and recovered the Stick of Truth.
You defeated Princess Kenny while living with Dire AIDS.
You have joined the KKK.
You completed your first day in South Park.
You defeated the High Jew Elf Kyle in battle.
You befriended the Goths, like everyone else playing this game.
You shat your pants during a boss battle.
You successfully blocked every enemy attack in a single (non-tutorial) battle.
Over the course of the game, you've scored 100 perfect attacks.
Over the course of the game, you've blocked 100 attacks.
You've unlocked all of the upgrades for a New Kid ability.
You sold 300 junk items.
Defeat Cartman in battle.
Let Gingers bite you 3 times without blocking.
Defeat the Boss Hall Monitor while wearing freckles.
Fling a turd that you created at an enemy in combat.
Find Jesus while playing as a Jew.
Sell nothing the entire game.
Defeat Princess Kenny while looking like David Hasselhoff.
Fart on the Mayor, Father Maxi, Principal Vic, & Prime Minister.
Fart on a canine enemy while in Gnome form.
Hit 3 enemies with a single fart outside of combat.
Defeat Princess Kenny while in your Makeover disguise.
Fart on each available buddy in the game.
Interrupt 5 channel attacks with a fart.
Defeat the Meth Tweekers while wearing the Evil Cartman goatee and the bald cap.
Watch your parents have sex for 60 seconds.
Fart on 10 enemies in the world when they're knocked out.
Defeat at least 3 enemies in one battle while your buddy is unconscious.
Complete the game without ever ending a combat with a buddy knocked out.
Collect all the Chinpokomon.
Befriend your Dad.
Befriend all of South Park.
Fart on people 100 times
Fart on animals 25 times.
Complete all available Costume Sets.
Fart on the corpse of an aborted Nazi Zombie fetus.
Befriend Crab People and Underpants Gnomes.
Have Kenny Die 10 times in battle over the course of the game.
Collect all the weapons and costumes available in the game.