The D7VK project for providing Direct3D 7 support on Linux with Wine / Proton has expanded in the version 1.1 release to add experimental Direct3D 6 support.
The very popular gaming-focused Bazzite Linux has a fresh release out that ended 2025 with a little spring cleaning, and I've finally joined the ranks.
Cannon Fodder is a retro action-strategy gem from 1993 that was originally released on my old love the Amiga, and the modern open source port just got upgraded.
Monado is an impressive open source XR runtime that aims to support a whole lot of hardware, with a focus on great Linux support and version 25.1.0 is out now.