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