Lakka - Lakka is the official Linux distribution of RetroArch and the libretro ecosystem.

Drauger OS - Drauger OS is an Ubuntu-based Linux desktop gaming distribution that ships with many modifications and optimizations over stock Ubuntu that are intended to improve gaming performance and the gaming experience.

ChimeraOS - Steam, Epic, GOG, retro consoles, and more... all from your couch

Fedora Games - The Fedora Games spin offers a perfect showcase of the best games available in Fedora. The included games span several genres, from first-person shooters to real-time and turn-based strategy games to puzzle games.

Ubuntu GamePack - UALinux / Technology of the future - already today

Garuda Linux - Garuda Linux is an appealing Arch Linux based Distro with BTRFS (modern filesystem), Linux-zen kernel, auto snapshots, gaming edition and a lot more bleeding edge features..