Sly land is where Sly Cooper lives. It is a parallel universe to ours, except that it is full of brain-dead dumbos and weird aliens so don't go near it. It is so crappy that the Zoni didn't bother conquering it. You will get weirdos who say it is better than Ratchet and Clank, but they are just dumb and don't listen. If you hear that, you are advised to put your hands in your ears and hum show tunes of your choice. Immediately.