Destroy Grýla's cauldron

Upgrade one piece of armor

Battle the God of Thunder

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

Catch a fish of each type using the fishing line

Complete all the flytings

Complete all Roman collector challenges

Defeat The Parasiter

Visit Calico for the first time

Hit 45 weakspots

Kill 10 enemies in a row using only Gauntlet after obtaining the Revolver

Complete Mass Effect 1, 2 or 3 on Insanity without changing difficulty