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