MORTAL KOMBAT: ARMAGEDDON UNLOCKABLES
Dairou alternate costumes
Open the chest at the end of the second ice hallway at the start of the Lin Kuei Temple entrance.
Darrius alternate costumes
Open the chest behind the discolored wall at the start of the Lin Kuei Temple, where you are attacked by Lin Kuei Archers.
Drahmin alternate costumes
In the Netherrealm after you defeat Drahmin, shoot down the bat creature over the nearby cliff.
Ermac alternate costumes
Open the chest by the left wall in the room where you are attacked by the Red Commandos for the second time.
Frost alternate costumes
Break all of the tombs lining the wall in the room where you meet Frost.
Fujin alternate costumes
Defeat all of the Red Dragon Soldiers at the start of the Charred Mountain.
Goro alternate costumes
Open the hidden chest to the left of the first area in Shao Khan's Fortress (directly to the right of a musical note).
Havik alternate costumes
Defeat all of the demons in the second area of Shinnok's Spire.
Hotaru alternate costumes
Open the chest close to the wall in the second room of the Tekunin Warship.
Hsu Hao alternate costumes
Open the chest on the right walkway after you wake up on the Tekunin Warship.