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