I guess by anything you mean Windows versions, because other than Windows, Skullgirls is -as far as I know - on PS3, PS4, 360 (as Encore), Linux and Mac. Indivisible is aiming for PlayStation 4, Xbox One, and Steam Windows / Mac / Linux. The prototype is Windows only. From what I've been reading in this thread, it seems the prototype is a major draw for many people and the deciding factor in backing. For anyone on any of the other platforms, that factor isn't there. Not sure how much of a difference that makes, Mac and Linux have small market shares, and I don't think prototypes would be possible on PS4 or XB1.