Microsoft’s latest iPhone game (yes, iPhone) is Age of Empires: Castle Siege

If you want to get two companies to get along, provide them a way to make money together.

Microsoft has unleashed the latest entry in its strategy gaming series Age of Empires on iOS today. This game was previously available through the Windows Store for PC and Windows Phone, but now it is also on the iOS App Store for free. Not only is the game out for both platforms now, but developer Smoking Gun Interactive added cross-platform multiplayer that enables gamers on Windows to play against their iPhone-using counterparts. If you’re wondering what Microsoft is doing publishing one of its first-party games on a competitor’s device, it probably has something to do with iOS making up a much bigger piece of the $30 billion mobile gaming industry than any other single platform.