Full list of all 23 Gunnhildr achievements.
The base game contains 5 achievements, and there is 1 DLC pack containing 18 achievements.
Successfully complete each type of training room.
Defeat the Goddess Warden, Hel.
Escape Niflhel three times in a single run.
Clear a high-threat room without taking damage.
Perform seven visceral finishers within seven seconds of each other.
Steal 700 energy cores from the armor of your foes.
Defeat 300 adorable Grenadiers.
Defeat 300 stubborn Berserkers.
Defeat 300 haughty Pistoliers.
Defeat 300 implacable Heavy Gunners.
Defeat 300 lurking Snipers.
Defeat 300 silent Knights.
Defeat 300 mindless Thralls.
Destroy 300 automated Turrets.
Defeat 300 enemies before returning to your cell.
Defeat Hel within thirty minutes of leaving your cell.
Defeat Garmr within fifteen minutes of leaving your cell.
Defeat every member of a Code Violet Security team before destroying the anchor crystals.