Select a Trials of Grievance instant action mission.
-Change your name to Calvin in the Star configuration screen (case sensitive) to add the Elemental between Dire Wolf and Fire Moth. Note: The game may crash if this Mech is used. -Change your name to Hobbes (case sensitive) to add the Tarantula between Elemental and Fire Moth. -Change your name to Enzo (case sensitive) to add the Battlemaster IIC between Tarantula and Fire Moth (latest version patch required).