Complete each achievement to receive the allotted gamerscore.
Unlockable How to Unlock 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 Born to Kill (10) Kill a total of 25 aliens in single player Break Out the Arsenal (10) Fire every weapon and use every item in single player Campaign Veteran (25) Complete all single player levels 1-5 Elite Force (10) Kill 50 aliens in a row without taking damage in single player Fighting Light (20) Complete any single player level without using any items Hard to Kill (20) Complete CO-OP Assault level 1, 2 or 3 without either player dying Killing Spree (10) Kill 20 aliens within 30 seconds in single player Knowledge is Power (20) Collect all the logs throughout the game No Stone Unturned (10) Find all secret collectibles Team Veteran (20) Complete "Hydroponics" in Co-op Assault
Contributed By: Guard Master.
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