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