Full list of all 25 Unknown Entity achievements.
The base game contains 0 achievements, and there is 1 DLC pack containing 25 achievements.
Obtain an artifact with all its variants
Obtain two artifacts with all their variants
Obtain three artifacts with all their variants
Obtain four artifacts with all their variants
Obtain five artifacts with all their variants
Kill a boss on all difficulties
Kill two bosses on all difficulties
Kill three bosses on all difficulties
Kill four bosses on all difficulties
Kill five bosses on all difficulties
Get one different skin
Get two different skins
Get three different skins
Get four different skins
Get five different skins
Kill the first series of bosses in a row
Kill the second set of bosses in a row
Kill the third set of bosses in a row
Kill the fourth set of bosses in a row
Kill the fifth set of bosses in a row
Complete all achievements