Kill the dissenter

Kill 5 drivers without destroying their vehicle

Kill 2+ enemies with one Rossmore blast

Collect 10 journals

Kill 50 enemies with the Bullseye or Marksman while moving, without using zoom

Fully upgrade one weapon in Campaign Mode

Execute a 200-Hit Combo

Kill 5 Longlegs in mid-jump

Escape the burning building

Throw 10 enemies into other enemies

Sink Atlantis

Acquire Thera's Bane

Defeat 1st Colossus