Hide 5 bodies in bales of hay

Pickpocket 50 people

Become an Initiate of the Hidden Ones

Complete all the flytings

Place an item on each settlement cosmetic spot (Base game only)

Release a firefly in your settlement

Kill or incapacitate 50 enemies while time is slowed.

Kill or incapacitate 300 enemies using ranged weapons.

Kill or incapacitate an enemy who threw a grenade at you.

Complete the Asgard and Jotunheim quests

Return to Odin's Camp for the first time (The Forgotten Saga)

Use a Metro Station to Fast Travel.

Spend your first Mastery point