Last month, Valve announced a beta version of Steam Remote Play Together, which lets you play local multiplayer games online with friends on Windows, Linux and macOS. Today, Remote Play Together is officially available to everyone, with what could be a really cool new feature - you can play with your friends through both your iOS and Android devices.
According to Valve, the host player just needs to install and run the game, and friends on PC can join via Steam Remote Play or mobile via the Steam Chat and Steam Link apps. Only the host needs to actually own the game, which is nice.
We haven't yet been able to test Remote Play with iOS and Android clients, so we don't know if there can be a delay in the network when playing an action game. This will probably depend on the host's internet connection and how far they live. But in the promotional stream that Valve is hosting to show off the feature in action, it looks pretty smooth. As I watched it, two players played Cuphead, and here and there I noticed only a few small frame drops. (And some of these drops may just be from the stream itself.)
Steam also sells on multiplayer games to celebrate the launch of the new feature. The sale runs until Monday, November 25 at 1:00 PM ET.