The Return to Castlevania Add-on for Dead Cells has 13 achievements.
Reach the Castle's Outskirts for the first time.
Reach Dracula's Castle for the first time.
Reach the Defiled Necropolis for the first time.
Reach the Master's Keep for the first time.
You beat Death!
You beat Death without taking a single hit!
You beat Dracula!
You beat the last encounter of Castlevania!
You beat the last encounter of Castlevania without taking a single hit!
Have Maria's Cat deal the last hit to Death.
Kill a Werewolf with a Throwing Axe
You beat the last encounter of Castlevania with the Vampire Killer.
Hit the same enemy with 5 orbiting Bibles in short succession.