Dev says Microsoft is keeping a f2p cross platform game off the Xbox One.

The Xbox One is technically capable of supporting cross-platform play, but Microsoft is not currently allowing it, according to War Thunder developer Gaijin Entertainment CEO Anton Yudintsev.

“Microsoft is not allowing cross-play completely; which means [War Thunder] cannot be on Xbox One,” Yudintsev told GameSpot at GDC last week in San Francisco.

Why would Microsoft block cross-platform play? According to Yudintsev, Microsoft needs to certify game servers as a means to ensure a “good experience” for all players. This isn’t possible under the current circumstances, Yudintsev said.

Xbox boss Phil Spencer said previously that cross-platform play between Xbox One and PC “makes sense,” teasing that he’s “not allowed to leak things,” suggesting this feature may actually be in the works. We’ve reached out to a Microsoft representative for a further comment.

a Microsoft representative provided GameSpot the following statement:

“For developers interested in enabling cross-platform game play between Xbox One and PC, we work with them closely to meet their development needs and ensure a great user experience.”