Here is the full list of all 22 BloodGate achievements.
Kill 500 enemies
Unlock 14 Warlock spells
Complete 100 dungeons
Collect 100 skulls
Unlock 10 Warlock spells
Open 20 boxes
Complete 30 dungeons
Collect 40 skulls
Kill 100 enemies
Open 5 boxes
Kill 2000 enemies
Complete 500 dungeons
Collect 300 skulls
Open 100 boxes
Max out 14 Warlock spells
Unlock 10 Stalker spells
Unlock 13 Stalker spells
Max out 13 Stalker spells
Unlock 10 Ironclad spells
Unlock 13 Ironclad spells
Max out 13 Ironclad spells
Kill Black Dahlia