Chao is a new collectible in Sonic x Shadow Generations that offers a new way of looking at levels you might have completed in the original game.

Each level has six Chao to find, split between Act 1 and Act 2, and unlocking them gives you special bonuses in your collector’s menu in the primary stage select screen. Green Hill Zone is the first stage you drop into, and while some of the Chao are easy to find to help you acknowledge their existence, there are some that you can easily miss if you’re going too fast.