This page is not finished yet, it does not have all the info that it should have. A Challenge is similar to an achievement in some ways, but in others, they are different. Some challenges are like small missions and others are like achievements. Below they are seperated into two groups; Challenges and Achievements.
Hungry Kitty- Collect all the Cat-Nip in one single level.
The Gold Cat Award- Beat the game.
Invincible- Recieve no damage through an entire level.
Doomsday Prepper- Collect all catnip in major levels/main levels.
Saving Srgt. Kitteh- Defeat all enemies in the rescue level.