Lenovo Legion Go S: SteamOS Arrives on a Third-Party Handheld

Lenovo's upcoming Legion Go S gaming handheld will be the first non-Valve device to launch with SteamOS pre-installed. This marks a significant expansion for Valve's Linux-based operating system, previously exclusive to the Steam Deck.

The $499 Lenovo Legion Go S (16GB RAM/512GB storage) will debut in May 2025. This offers a compelling alternative to Windows-based competitors like the Asus ROG Ally X and MSI Claw 8 AI+, leveraging SteamOS's optimized, console-like experience for portable gaming.

While initially leaked, Lenovo officially unveiled the Legion Go S alongside the Legion Go 2 at CES 2025. The Go S boasts a more compact and lightweight design compared to its predecessor, while maintaining comparable performance. The availability of a SteamOS version broadens consumer choice within the handheld PC market.

Lenovo Legion Go S Specifications:

SteamOS Version:

• Operating System: Valve's SteamOS
• Launch Date: May 2025
• Price: $499 (16GB RAM / 512GB storage)

Windows Version:

• Operating System: Windows 11
• Launch Date: January 2025
• Price: $599 (16GB RAM / 1TB storage), $729 (32GB RAM / 1TB storage)

Valve has ensured feature parity between the SteamOS version of the Legion Go S and the Steam Deck, promising identical software updates (excluding hardware-specific adjustments). A Windows 11 version will also be available, offering a more familiar operating system at a higher price point. Currently, there are no plans for a SteamOS version of the flagship Legion Go 2, although this could change depending on the success of the Legion Go S.

Lenovo's partnership with Valve is currently unique. However, Valve's announcement of a public SteamOS beta for other handhelds in the coming months suggests broader compatibility is on the horizon for devices such as the Asus ROG Ally.