Not a gaming distro but OpenSUSE has Aeon and Kalpa that are arguably more secure with more volumes also being encrypted, focus on btrfs snapshots being reliable vs rpm-ostree style images, etc...

I used it before bazzite 2 years ago or so but it was a worse user experience in most ways even if there are technical benefits for it (steam via flatpak needing hours of figuring out non- documented modifications to get working, GRUB decryption that is not only slow and prone to errors but also doesn't show characters typed for a long passphrase and fails after the first try, volume mounting errors every other boot so booting would fail, and layering being worse than Fedora at the time, etc...)

And nobody can argue that openSUSE doesn't have the most fun mascot/logo haha.