VMs with GPU passed through. You can get Mac compatible GPUs that will work, look for the Dortania OpenCore guide GPU lists to find one that works for the version of Mac OS X it runs on. Looking on Macintosh Repository, that game will run on Intel CPUs and Snow Leopard, 10.6+. (IDK for sure.) You can emulate Intel Mac OS X using QEMU on linux machines, there are some scripts that make it easy from Proxmox that I use.

You can also emulate PPC Mac OS X and pass through devices, but I have not tried to do this, so your mileage may vary.

It is easier to emulate 10.7+ versions than 10.6, but you can get it to work from 10.4 with work.

It runs on Rosetta w/ a few fixes.

https://gist.github.com/JoshCooley/095b80f9639a4dc7e762208ae...