Kill 50 enemies with melee attacks in a single player campaign.

Kill 3 floating enemies.

Picked 50 locks

Defeat 2 enemies with one flash grenade.

Defeat every wave in all Satellite Strike mini-games

Collect 50% of all File Cards

Complete all Desert missions

Complete a mission using only Heavy class characters

Defeat Baroness

Defeat every wave in one Satellite Strike mini-game

Perform 10 barrel rolls in unison in any level in co-op

Activate the Accelerator Suit three times in any mission

Complete any mission in 2 player co-op