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