Defeat Hammerhead on any difficulty level

Call in a rescue in Outbreak.

Acquire the exo suit without spending any money in Outbreak.

Defeat 100 enemies

Upgrade 2 weapons to level 20 in Outbreak.

Successfully Complete the Exo Survival Bonus Wave.

"Flip" a map twice.

“Flip” a map.

Complete the campaign on Hardened difficulty.

Go through 20 gun drops in one-armed combat in "Captured."

Melee an enemy so they fly off the side of the ship in "Armada."

Kill 20 enemies with the Grappling Hook in "Sentinel."