| Achievement | How to unlock
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| Baiter Bane ( 20 points ) | During an Xbox Live Co-op game, kill five baiters in any level without using any smart bombs.
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| Competitive ( 15 points ) | Win 30 Xbox Live versus games.
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| Cooperation ( 10 points ) | Get a score of 15,000 during an Xbox Live Co-Op game.
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| Fifteen Grand ( 15 points ) | Get a personal score of 15,000.
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| Five Waves ( 20 points ) | Make it to the fifth wave.
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| Getting Better ( 15 points ) | Make it to the third wave.
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| Mutant ( 10 points ) | Shoot five mutants in one game.
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| Nice Catch ( 15 points ) | Rescue a human with a mid-air catch.
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| One Wave ( 10 points ) | Make it to the second wave without losing any humans.
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| Protect All Humans ( 25 points ) | Lose no humans in the first three waves.
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| Run! ( 20 points ) | Survive the first 75 seconds without shooting, bombing, or teleporting.
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| Twenty-Five Grand ( 25 points ) | Obtain a personal score of 25,000.
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