Could be a little game one kid makes in their basement - like the first one of this was: http://marketplace.xbox.com/en-US/Product/Solar-2/66acd000-77fe-1000-9115-d802585508b4
or a game made by a small team not associated with a major developer.
Think of it like an unsigned artist on a talent show. Some are good, some are bad, and some are going to be absolutely huge once people learn about them.







