Re: Not as if they're the only ones.
RHEL7.5 onwards is x64 only, no x86
There wasn't a 32-bit install since RHEL7.0. There's a AltArch i386 CentOS spin (among other interesting architectures), but that's it. I'm actually pretty surprise the game people didn't see this coming and find a workaround, but that probably says more about my lack of imagination than tech.
Realistically, we're to the point where my beloved Amigas are: either get an emulator/VM with GPU pass-thru, or build yourself a dedicated "old game" box with Windows 7/XP (or an older version of Linux) and play on that.
(FWIW, KVM VMs on LInux support GPU passthrough, so it's not like you have to get exotic or anything)