Valve is advancing the transition of the Steam Linux client from a 32-bit to a 64-bit architecture, with the new client now available in the testing branch. Meanwhile, the "Achievement Sets" grouping feature has entered the stable channel with the November 11 client update.
This architectural transition follows Valve's RT3 test client plan announced earlier in 2026, with one of the goals being to provide a more consistent user experience for Steam across different Linux distributions. Currently, the 64-bit client is still in the testing phase, and the date for its full release to the stable channel has not yet been announced.
The new "Achievement Sets" allow developers to organize achievements by base game, DLC, and other content categories. Users can also view and track their progress through the updated achievement page, making it easier to distinguish between base game and additional content.
The November 11 Steam client update also includes several improvements to performance, responsiveness, and stability. Prior to the launch of the latest beta version, Valve also updated the mainline client, significantly reducing cold start times.