Universal Blue is the project which maintains Bazzite and other brilliant immutable images based on Fedora Silverblue (Gnome) and Fedora Kinoite (KDE)

Bazzite has Steam bundled in the image which is a bit better for performance, Bazzite-dx is Bazzite with devtools.

Aurora is another image made for general computing, Steam is installed as a Flatpak with a little worse performance but not much

Bluefin is your typical dev-workstation

If you’re serious about gaming I recommend KDE as your desktop environment, plays nicer with HDR, VRR and fractional scaling than Gnome.