Here is the full list of all 14 Hellblusser achievements.
Obtain 20 blessings.
Loop back to the sewer.
Obtain the golden blade.
Obtain the cloak of sadness, drain blade, and become a drainer.
Collect 50 tears.
Obtain 10 blessings.
Enter hell.
Eat a donut while being hungry.
Collect 50 coins.
Obtain 5 blessings.
Enter the dungeon.
Complete a level with full health.
Complete a level with full fire.
Extinguish the hell with no blessings obtained.