Outcast has a very original setting, with humanity having been evicted from Earth by superhitech aliens. Our descendants are forced to eke out their lives on marginal worlds that are interconnected by stargates. Unfortunately, the book is too thin to be a useful foundation when building a campaign. The authors don't provide sufficiently fleshed-out worlds. My advice is straightforward: revise and expand. Outcast should contain at least twice as much text to be attractive to me. This is a pity, because I like Outcast's underlying concept a lot.