Here is the full list of all 23 Afterparty achievements.
Beat Satan and earn your way back home.
Recruit the Drunk Idiot Demon for Satan's final challenge.
Make friends with Sam.
Make friends with Wormhorn.
Reunite Milo and Lola.
Play as Milo after fighting with Lola.
Get Apollyon's Seal of Approval.
Play a perfect stacking game.
Get Asmodeus's Seal of Approval.
Don't miss a step while dancing.
Try 20 different drink types.
Pet the damn dog.
Get an Invite to Satan's from Lynda.
Kick off your adventure in Hell.
Get an Invite to Satan's from Fela.
Play as Lola after fighting with Milo.
Intentionally lose to Satan.
Fail to beat Satan.
Reunite Beth and Asmodeus.
Play a perfect game of beer pong.
Intentionally curse twenty times.
Drink a lot of booze.
Waste 20 minutes on Bicker.