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