As you may have rightly presumed when news hit yesterday that Rise of the Tomb Raider is an Xbox exclusive, it won't stay that way forever.
Xbox head Phil Spencer told Eurogamer that the exclusivity deal has a duration, since Microsoft didn't buy the franchise. He declined to go into details about how long that duration is, or how much Microsoft paid for the exclusivity period. He did stress several times that he wants to be open and transparent about the nature of the deal, but considers those kinds of details private. From his comments, it sounds like the holiday season is the window.
"I have Tomb Raider shipping next holiday exclusively on Xbox. It is Xbox 360 and Xbox One," he said. "I'm not trying to fake anybody out in terms of where this thing is. What they do with the franchise in the long run is not mine. I don't control it. So all I can talk about is the deal I have. I don't know where else Tomb Raider goes."
Check out our thoughts on the business move from Square Enix's perspective.