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The “Xbox experience” stops Halo on PS5 or Switch, says Phil Spencer
Xbox head Phil Spencer said he isn't considering the use of Microsoft Game Stack to release first-party titles like Halo on other platforms. According to Spence

Xbox head Phil Spencer said he isn’t considering the use of Microsoft Game Stack to release first-party titles like Halo on other platforms. According to Spencer, consoles including the PS5 and Switch wouldn’t offer the full “Xbox experience” that gamers expect from the brand.
Microsoft Game Stack was announced earlier in the year, a “device agnostic” service that has the ability to bring full Xbox Live support to platforms beyond Xbox and Windows PC. Though we’ve seen it in play — at least in part — on Xbox Game Studios titles published to the Nintendo Switch, Spencer says that support doesn’t equate to “the full Xbox experience”.
“We have done some work on the Switch with Ori [and the Blind Forest: Definitive Edition] and Cuphead… and Minecraft’s obviously there,” acknowledged Spencer, speaking with Stevivor at X019 in London. “But I’d say our strategy is really to think about the full Xbox experience; we want that full Xbox experience to be amazing.”
“When you think about other hardware platforms, I’d want to think, holistically, is there an opportunity to bring all of Xbox there? And in most cases the other partners probably aren’t that interested in the whole Xbox ecosystem coming onto their hardware,” Spencer said.
That notion of the Xbox experience is precisely the reason why upcoming titles like Halo: Infinite won’t be multi-platform beyond Microsoft’s own ecosystem.
“Halo is such a great example — such an intrinsic part of Xbox,” Spencer said, praising it for its part in “the evolution of Xbox Live” alongside the Xbox brand itself.
“I don’t want to get into this world where we… pick apart [an IP] because then we lose the ability to build a cohesive experience,” he continued. “We lose the ability for those services to provide value… if we don’t have the full Xbox experience to bring to our customers.”