The Himminbrjotir, Clan of the Ox Add-on for Northgard has 7 achievements.
Win with the Clan of the Ox
Get 50 Victories with Clan of the Ox
Finish a Conquest with the clan of the Ox
Build the Relic of the Clan of the Ox
Destroy 4 different buildings with the Ram ability in one game.
Find 6 Legendary items in one game
Win a game with the clan of the Ox without reaching max population