Linux's record-breaking run on Steam lasted exactly two months. Valve's May 2026 hardware survey puts the open-source OS at 3.99%, down from 5.33% in March and 4.52% in April. That is three straight months of decline and a 1.34 percentage point drop from the peak.
Windows 11 absorbed most of that lost ground. Microsoft's latest OS now accounts for 69.76% of Steam users, a 2.02% gain.
Windows across all versions holds 93.85%. macOS crept up to 2.16%. The March 5.33% figure was always suspicious. Linux took years to climb from 1% to 2% on Steam and only crossed 3% in late 2025.
Jumping to 5.33% in a single month was unprecedented. The May result at 3.99% aligns far more closely with Linux's long-term trajectory, suggesting the March spike was a sampling quirk rather than a sudden migration.
Valve's Steam survey is optional and anonymous, meaning monthly results depend heavily on which users opt in. If SteamOS devices were overrepresented in March's sample pool, that alone could explain the surge and subsequent retreat. The distribution breakdown reinforces the niche reality. Arch Linux leads at 0.35%, followed by Linux Mint 22.3 at 0.31% and Ubuntu variants at 0.25% combined.
Every other distro registers below 0.1%. None of this negates Linux's progress. The platform spent years stuck below 2% and now holds nearly double that baseline. The Steam Deck proved Linux can deliver a legitimate gaming experience, and Valve's Proton compatibility layer keeps expanding. But the May survey is a reality check: Linux gaming remains a small slice of a very large pie, and Windows 11 is showing no signs of letting go.
