Successfully complete the indicated task to unlock the corresponding achievement. To view your achievements and stats in Steam, select "Community", "My profile", "View all my games", then the game and view stats.
- Against The Odds: Completed the Single Player game on Elite difficulty.
- Aint Got Time To Bleed: Finished "Interface" single player level without using any health packs.
- Born to Kill: Killed a total of 25 aliens in single player.
- Break Out The Arsenal: Used all weapons and items in the game.
- Campaign Veteran: Single player completed.
- Elite Force: Killed 50 aliens in a row without taking any damage.
- Fighting Light: Finished a single player level without using any items.
- Hard To Kill: Finished Co-op Assault level 1, 2 or 3 with no player losing a life.
- Killing Spree: Killed 20 aliens in 30 seconds.
- Knowledge Is Power: Picked up 100% of the logs.
- No Stone Unturned: Found all secret collectibles.
- Team Veteran: Complete "Hydroponics" in Co-op Assault.
- Time to Party: Complete 3 Co-op Assault multiplayer games.