Can’t help with saved game data, but Bazzite is a solid choice, not just because it’s a gaming based distro. It’s one of the immutable distros, so all the important stuff that keeps it running, you can’t mess with (easily). And all your personal stuff that doesn’t keep the computer running, it doesn’t touch. So your computer is always up to date ( faster than steamOS, and if something goes wrong, just reboot into the previous) and you can’t screw it up without trying.