Valve’s handheld device, the Steam Deck, wasn’t the first portable gaming PC ever created, but it is by the far the most successful. And like Steam becoming the de facto way people play PC games in 2025,

Lenovo has finally announced a new line of Legion Go handheld PCs, with one that will come installed with SteamOS out of the box. The new model is called the Legion Go S, and it's the world's first handheld PC from a third-party manufacturer using Valve's operating system.

Valve is making a notable shift with its portable gaming strategy as Lenovo debuted a new edition of its Legion Go gaming handheld that runs Valve’s custom operating system.

Lenovo is already announcing one new handheld (or two depending on how you’re counting) at CES 2025. However, that isn’t stopping the company from looking ahead to its next portable gaming device by teasing an early prototype of the Legion Go 2.

SteamOS is slowly becoming an alternative to Windows for handheld gaming devices. After launching the Steam Deck with SteamOS, its own operating system, Valve is now partnering with third-party manufacturers so that they can release gaming handhelds with SteamOS support.

At CES today, though, I got the chance to try the Legion Go S, Lenovo's competitive new handheld PC that comes in both SteamOS and Windows varieties. With an 8", 120Hz display, an AMD Ryzen Z2 Go CPU,