http://www.gameinformer.com/b/news/archive/2014/08/21/ascend-hand-of-kul-unexpectedly-discontinued-on-xbox-360.aspx
Update: Microsoft has responded to a request for comment on Ascend: Hand of Kuhl.
“We can confirm that effective November 18, 2014, ‘Ascend’ on Xbox 360 will close," a Microsoft representative told us via email. "Players will still be able to play ‘Ascend’ on Xbox 360 and use any content they have already acquired until the game closure date. This only applies to ‘Ascend’ on Xbox 360 - ‘Ascend’ will continue to be available on the Steam gaming platform. We thank Signal Studios and its community of gamers for their support and look forward to welcoming them into our other gaming communities.”