Complete all the Final mission achievements.
Complete the “Maw of the Void” mission without losing a unit inside the Rip-Field on Hard difficulty.
Use the Artifact no more than once in the “All In” mission on Hard difficulty.
Kill 50 units with a single Penetrator Round in the “Belly of the Beast” mission on Hard difficulty.
Win a Free-For-All Multiplayer Custom Game against 7 Medium A.I. opponents.