Here is the full list of all 12 Devilated achievements.
Travel to a new land
Travel to 10th land
Finish the game in Slaughter I Rank
Finish the game in Slaughter II Rank
Finish the game in Slaughter III Rank
Have more than 3,647,035 gold
Unlock all Soul Spheres
Unlock all item slots
Found a secret for the first time
Use Fatality Power for the first time
Being followed by something
Woke something up