Here is the full list of all 11 Dwarfenstein achievements.
Do 666 headshots
Kill 5k monsters
Kill enemy from 30+ distance
Good luck finding The Secret Level.
Complete Tutorial
Survive 10 waves on Survival
Survive 40 waves on Survival
Survive 80 waves on Survival. This shouldn't be possible
Do 15 headshots in a single level
Do 10 Multikill Combo
Beat the game without dying!