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 Lola after fighting with Milo.
Get Apollyon's Seal of Approval.
Play a perfect stacking game.
Try 20 different drink types.
Get Asmodeus's Seal of Approval.
Reunite Beth and Asmodeus.
Waste 20 minutes on Bicker.
Pet the damn dog.
Get an Invite to Satan's from Lynda.
Don't miss a step while dancing.
Kick off your adventure in Hell.
Get an Invite to Satan's from Fela.
Play as Milo after fighting with Lola.
Intentionally lose to Satan.
Fail to beat Satan.
Play a perfect game of beer pong.
Intentionally curse twenty times.
Drink a lot of booze.