Daath Galaxy is a massive single player RPG game for Windows (and eventually Linux and Mac OS X.) It is an open world sandbox style RPG, which features a deep main quest to save your universe, and all universes within the multiverse, from being destroyed. That is, unless you’re evil, in which case feel free to aid in the destruction of all realities… you know if you’re into that sort of thing. Of course, there’s a third option, a neutral option, and like a true open world sandbox game, you can even just ignore the main quest and still find a lot of fun things to do.