ACHIEVEMENT - HOW TO UNLOCK
Camper - Reach 120 seconds in Wave 1 without dying on the default settings.
Flawless - Beat Wave 1 without dying on the default settings.
Co-Op - Beat Wave 5 in Xbox Live with another player on the default settings.
Co-Op Master - Beat Wave 20 in Xbox Live with another player on the default settings.
High score - Reach 1st place on the game score board on the default settings.
Pterodactyl - Defeat a Pterodactyl.
Triple Pterodactyl - Defeat three Pterodactyls in a game on the default settings.
Versus - Reach rank 5 in Xbox Live Ranked Versus mode.
Wave 5 - Reach Wave 5 on the default settings.
Wave 10 - Reach Wave 10 on the default settings.
Wave 30 - Reach Wave 30 on the default settings.
Wave 100 - Reach Wave 100 on the default settings.