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