Valve just released another update for their SteamOS, update 105. Apart from the regular fixes and patches, this update increases the list of hardware SteamOS is compatible with out of the box. This new update includes support for hardware from different vendors, so that you don’t have to go about exploring about for an alternative to enable that one hardware that the OS isn’t detecting.
Remember Playkot's Supercity? Game artist Paul Geraskin liked has just started a crowdfunding campaign to support working on a new indie game, inspired by Howard Lovecraft: Road to Providence. As with Supercity, Road to Providence will be created with open source tools: Krita, Blender, and jMonkeyEngine.
Right out of the gate, Renderdoc isn't as useful to Linux users as is Valve's VOGL or other utilities like APITrace. Because, as it stands right now, Renderdoc only targets the Microsoft Direct3D 10/11 graphics API, but support for OpenGL is planned under this open-source Renderdoc. While still targeting D3D11 right now, there is basic build support for Linux of Renderdoc. I imagine in the months ahead it will get much more interesting once there's OpenGL API support and open-source contributors have had their hand at improving the Renderdoc Linux support.
Between stable builds, the developers launch a large number of Beta versions that integrate a lot of new features. Some of the updates are pretty large, if we take into account the first one in the new series, but more intermediary releases only feature a small number of changes.
According to the changelog, the performance of the Steam client in some cases with the Big Picture window out-of-focus or in-game has been improved, especially on the Linux platform.