My first "tech job" was doing support in the late 90s for DOS games at EA. At that point most folks had computers with 8 or 16MB of RAM. One of the old Jane's Flight simulator games had a check for minimum RAM requirements which for some reason would overflow at 128MB and say you didn't meet minimum memory requirements. So these folks would spend around $1000 on memory to build premium machines with 128MB and then get these old games which would say they couldn't play the game due to insufficient memory. The fix was to create a RAM drive which would caption of part of the RAM available to storage and leave a limited amount of available RAM to run the game which would clear the memory validation.
I believe at one point someone was able to actually install a game into the RAM Drive and play it on the left over available RAM but it required a game that could be installed and played without a reboot.