Complete all Roman collector challenges

Defeat all Alpha animals (Base game only)

Complete all the flytings

While on fire during a fight, kill 3 hard difficulty soldiers without breaking their shields

Ram and destroy 5 boats in under 2 minutes with your longship (Base game only)

Release a firefly in your settlement

Complete the Wincestre Arc

Fully upgrade and enhance a piece of gear

Assassinate an enemy from your horse

Assassinate 10 enemies in a row without triggering a conflict

Complete the Asgard and Jotunheim quests

Complete the Cent Arc