Here is the full list of all 18 Bierzerkers achievements.
Equip a weapon in the Armory
Win a match in overtime
Score in overtime
Win a game at the last moment for your team.
Kill 10 enemies in a single match
Win your first match
Win a game without the opposing team scoring
Score your first thrown goal
Score your first run goal
Score withing 30 seconds of the match start
Finish the tutorial
Get 3 kills without dying and receive Thor's blessing
Finish a match while in a party
Win 10 matches
Compete in 20 matches
Rack up a total of 100 kills
Score 100 running goals
Score 100 throwing goals