Born to Kill
Killed a total of 25 aliens in single player
Elite Force
Killed 50 aliens in a row without taking any damage
No Stone Unturned
Found all secret collectibles
Killing Spree
Killed 20 aliens in 30 seconds
Break Out The Arsenal
Used all weapons and items in the game
Knowledge Is Power
Picked up 100% of the logs
Hard To Kill
Finished CO-OP Assault level 1,2 or 3 with no player losing a life
Aint Got Time To Bleed
Finished 'Interface' single player level without using any health packs
Against The Odds
Completed the Single Player game on Elite difficulty
Fighting Light
Finished a single player level without using any items
Team Veteran
Complete "Hydroponics" in Co-op Assault
Campaign Veteran
Single player completed
Time to Party
Complete 3 Co-op Assault multiplayer games