SteamOS Debuts Beyond Valve's Confines on New System

Lenovo Legion Go S: The First Third-Party SteamOS 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 handhelds like the Asus ROG Ally X and MSI Claw 8 AI+, leveraging SteamOS's optimized performance for a smoother, console-like portable gaming experience.

Rumors of a SteamOS-powered Legion Go S circulated before its official announcement at CES 2025. Lenovo also unveiled the Legion Go 2 at the event, but only the Legion Go S will initially offer the SteamOS option. This model prioritizes portability with a lighter, more compact design compared to its predecessor, while maintaining comparable power.

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 guarantees feature parity between the Legion Go S and the Steam Deck, ensuring identical software updates (excluding hardware-specific adjustments). A Windows 11 version of the Legion Go S will also be available, offering a more familiar operating system at a higher price point. While the flagship Legion Go 2 currently lacks SteamOS support, this could change based on the Legion Go S's market reception.

Currently, Lenovo holds the exclusive license for a SteamOS-branded handheld. However, Valve's recent blog post promises a public SteamOS beta for other handhelds in the coming months, opening the door for broader adoption beyond the Lenovo partnership.