Call of Duty: Infinite Warfare is out today, but if you want to play it multiplayer, then you may have some difficulty. We knew the game and Modern Warfare Remastered did not have cross-platform play, but it appears that even some PC versions will be incompatible. 

First, according to Activision support, the game is not Play Anywhere, so only Xbox One player can play against others on the platform. But the kicker is that if you buy the PC version through the Windows Store, "you can only play these titles with other users of Windows 10 on Windows Store," Activision said. If you buy the game on Steam, you can't play with friends who bought from Microsoft.

However, while Microsoft may look like the culprit here, a response to a query from Windows Central makes it appear the option was available. "We support cross-play between devices and platforms for partners who want to enable it,” Microsoft said. Given that wording, Activision apparently chose not to enable the cross PC play between Steam and Windows Store versions.

It's an interesting development given that players did not know this ahead of time and may have prepurchased the game from different stores. If you haven't gotten the game yet and want to play with friends, make sure you get Call of Duty: Infinite Warfare from the same place.