Now that Microsoft has announced plans to bring first-party Xbox exclusives to the PC, some people were wondering if Halo 5 would be one of those titles. Phil Spencer, the head of Microsoft's Xbox division, responded by saying he believes games should be designed with both platforms in mind or you'll end up with what he called ‘Frankengames.’ He went on to say the company is looking to the future of game development, not at porting past titles to the PC.
There are games that Spencer believes work fine on both platforms: he cited Forza 6 as an example, and Quantum Break and Rise of the Tomb Raider are clearly other examples. He doesn't want to make release parity across those platforms a rule, though. "I don’t want to make it some kind of artificial mandate, because then I think we end up with ‘Frankengames’, games that really weren't meant for a certain platform. And because some suit said, ‘Hey, everything’s gotta run on both platforms’, you end up with something people don’t want.