During Microsoft’s E3 2019 media briefing, Sega revealed it would be bringing Phantasy Star Online 2 to the Xbox One and PC outside of Japan. (Though, it didn’t announce an EMEA release.) While only those two platforms have been confirmed so far, Microsoft Executive Vice-President of Gaming Phil Spencer has noted that Phantasy Star Online 2 will eventually “end up on all platforms.” (Thanks, Giant Bomb!)
To be specific, Phil Spencer said the following about Phantasy Star Online 2.
It was so cool to have [Sega] on our stage and work with them. And yes, it’ll end up on all platforms. That’s not the point. To me, the point was to be able to have Sega back on our stage. It’s been a while.
Here is the Giant Bomb Nite Two at E3 segment where Phil Spencer appeared. He confirms Phantasy Star Online 2 is a multiplatform game at the 40 minute, 40 second mark. (The conversation about the game began at the 37:37 mark.)
The free-to-play Xbox One and PC version of Phantasy Star Online 2 will launch in North America in 2020. In Japan, the game appeared on the Nintendo Switch, PlayStation 4, PlayStation Vita, and PC. It also had an Android and Apple iOS companion game.