The Xbox Wire post announcing the new Xbox app game aggregation only mentions that you'll be able to "launch games from Xbox, Game Pass, Battle.net, and other leading PC storefronts," initially leaving Steam with a big question mark beside it.

Microsoft is starting to test its new aggregated gaming library in its Xbox PC app on Windows. Xbox Insiders will now be able to see their Steam and Battle.net games all within the Xbox app — making it a single launcher for most installed PC games.

Starting this week, Xbox Insiders will be able to see Steam, Battle.net and Xbox games in the Xbox PC app on Windows, which makes it a single launcher for your installed PC games. The first look can be accessed on Windows 11 PCs and handheld devices.