I can’t think of any of these offhand but I did play morrowind and gears for the first time on machines that were extremely not cut out for them
morrowind involved having the fog slider turned pretty much the whole way up, gears involved hooking my radeon 9600 up to a TV via s-video because it was actually less muddy looking that way at 640x480 than on a monitor, and having to fiddle with my athlon xp clocks to find an arbitrary sweet spot where it wouldn’t bottleneck or hang