The news comes indirectly from an announcement in Valve’s members-only Steamworks network that developers shared with PC Gamer.
Steam’s Alden Kroll described Remote Play Together a bit more on Twitter:
There’s good news for developers as well. The feature is reportedly built in to Steam, so there won’t be heaps of extra work involved on the development side of things.
Kroll further clarified by saying that “It really is only for shared-screen or split-screen games. The tech is streaming your screen to your friend and capturing their input and sending it back to the game, so you are both playing the same game, looking at the same thing.”
Remote Play Together is currently in beta testing. Valve plans to roll it out the week of October 21 fully.
Source: PC Gamer
