Rise of the Tomb Raider was initially announced as an Xbox exclusive, but there were many conflicting reports, and it was eventually revealed that it’s only a timed exclusive. We don’t know how long it will be Xbox-only, but we do know that Microsoft is apparently working very closely with Square Enix, as Xbox executive Aaron Greenberg has revealed that Microsoft will be publishing the game upon its initial release. Square Enix issued a statement confirming Microsoft as publisher and stated that they are showing “more support across development, marketing and retail than ever before.”
@diosmekemeke Yes we are publishing Rise of the Tomb Raider.
— Aaron Greenberg (@aarongreenberg) December 8, 2014