tomshardware[.]com/software/linux/linux-gaming-os-kazeta-promises-console-gaming-experience-of-the-1990s-for-pc-users-supports-almost-any-drm-free-game-past-or-present
kazeta[.]org/
This is IMHO an interesting take on Linux gaming, or PC gaming in general. The idea is you put your DRM-free games on SD cards, which then act as game cartridges. Then you insert an SD card / game cartridge & power on the PC with Kazeta installed, and it starts up with that game. No menus to navigate etc.