Microsoft has opened beta sign-ups for Project Spark, a PC, Windows 8 tablet, Xbox 360 and Xbox One title with cross-play. Despite a video demonstration during Microsoft’s E3 2013 press conference, we still don’t know a hell of a lot about it, except that it has you navigating an open world and building your own games before sharing them and remixing those of other players. Why not just throw your name in the hat and find out?
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