Campaign Veteran
Single player completed
25 
Against the Odds
Completed the Single Player game on Elite difficulty
25 
Team Veteran
Complete "Hydroponics" in Co-op Assault
20 
Fighting Light
Finished a single player level without using any items
20 
Ain't got time to bleed!
Finished 'Interface' single player level without using any health packs
20 
Hard to Kill
Finished CO-OP Assault level 1,2 or 3 with no player losing a life
20 
Knowledge is Power
Picked up 100% of the logs
20 
No Stone Unturned
Found all secret collectibles
10 
Elite Force
Killed 50 aliens in a row without taking any damage
10 
Born to Kill
Killed a total of 25 aliens in single player
10 
Break Out the Arsenal
Used all weapons and items in the game
10 
Killing Spree
Killed 20 aliens in 30 seconds
10