Campaign Veteran
Complete all single player levels 1-5
25
Team Veteran
Complete "Hydroponics" in Co-op Assault
20
Fighting Light
Complete any single player level without using any items
20
Against the Odds
Complete single player levels 1-5 on Elite difficulty
25
Ain't got time to bleed!
Complete 'Interface' single player mission without using a health pack
20
Hard to Kill
Complete CO-OP Assault level 1, 2 or 3 without either player dying
20
Knowledge is Power
Collect all the logs throughout the game
20
Break Out the Arsenal
Fire every weapon and use every item in single player
10
Killing Spree
Kill 20 aliens within 30 seconds in single player
10
No Stone Unturned
Find all secret collectibles
10
Elite Force
Kill 50 aliens in a row without taking damage in single player
10
Born to Kill
Kill a total of 25 aliens in single player
10