The The Delicious Last Course Add-on for Cuphead has 13 achievements worth 475 gamerscore.
Defeat every boss in Inkwell Isle IV
Obtain an A-Rank or Higher on all bosses in Inkwell Isle IV
Defeat a boss with Ms. Chalice
Defeat 10 bosses with Ms. Chalice
Defeat a boss with one of Ms. Chalice's Super Arts
Defeat a boss with one of Porkrind's new weapons
Defeat all of the King of Games' Champions
Defeat the King's Gauntlet
Complete your quest on Inkwell Isle IV
Get an S-Rank on a stage of Inkwell Isle IV
Defeat a boss on Inkwell Isle IV without killing any of its minions
Survive the nightmare
Obtain great power