Around three months ago, a flurry of rumors suggested that Microsoft was preparing many Xbox exclusive games to go multiplatform, including heavyweights like Gears of War, Starfield, and the upcoming Indiana Jones and the Great Circle.
Shortly after those rumors, Microsoft broadcast a 'business update event' where Xbox executives revealed that a few games were indeed making the jump to PlayStation and/or Nintendo Switch consoles.
These games turned out to be Hi-Fi Rush, Pentiment, Grounded, and Sea of Thieves. Phil Spencer labeled this an experiment and warned it didn't mean other, bigger games would definitely appear on other consoles: I don't think we should, as an industry, ever rule out a game going to any other platform.
We're focused on these four games and learning from the experience. I don't want to create a false expectation on those other platforms that this is somehow the first four to get over the dam and then the dam's going to open and everything else is coming.
That's not the plan today. Related Story Activision Boosts Microsoft Q3 Gaming Business, But Actual Xbox Sales Collapse ContinuesDo note that final caveat - it was not the plan at that time.