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