The confirmation came in response to a user's GitHub report detailing problems running the client on ARM64 systems. A Valve developer replied that "Steam for Linux is not currently supported on Arm-based hardware", a position the report describes as consistent for years. Official support remains limited to machines with x86-64 processors from AMD and Intel.

The stance looks odd given Valve's own Steam Frame headset runs on Qualcomm's Snapdragon 8 Gen 3, for which Valve optimised SteamOS and ported its Proton 11.0 compatibility layer to Arm, letting x86 games run on Arm hardware, yet the Steam client itself remains unsupported.

According to the report, getting the client working properly on Arm would likely require significant optimisation, and Valve apparently judges the potential user base too small to justify the effort.