Yes... "hacked" being the operative word. You are not legally allowed to install MacOS on any other computer than a Mac. I didn't mention hacks for a reason. Besides, if the OP wants to game, then MacOS is pretty useless in that department. Sure, it's better now than it ever has been... but finding drivers for the myriad of hardware in a custom-built machine is a nightmare. If you can find any at all, that is...