Of my ~500 Steam games, IIRC something like 300 have macOS builds, and about 200 for Linux. My experience is that most small studio or "indie" games will run o

Of my ~500 Steam games, IIRC something like 300 have macOS builds, and about 200 for Linux. My experience is that most small studio or "indie" games will run on all three platforms, about half of really big games have Mac releases and some much smaller portion also support Linux, and of course anything that runs under Dosbox works on all three. ~90% of the Linux games are indie or dosbox. MacOS is a much more viable platform for a gamer, also aided by being generally much less fussy/buggy for all things multimedia-dependent like games, though hindered by generally mediocre graphics cards. However you might be surprised what runs acceptably on a 2014-vintage Intel Iris graphics chip. I was.