Valve backstabbed u very sad. It is valve's nature just few month ago valve also backstabbed Piston which it officially announced at CES 2013 but it is not only a nature of valve we have a very fresh example of MS Xbone 180.
Every platform has a AAA exclusives I have PC to play WOW, LoL, Dayz etc etc and have Xbox360 for Halo & Gears while PS3 for Uncharted & Journey and many more. Multiplats which i can play on any platform.
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