I got by for years on a Pentium 75 and 8mb of RAM. The specs always said the game wouldn’t work, but it did. You could get away with this right up until PC gaming (finally) moved away from DOS. One big issue was the real mode DOS Plug n play drivers (dwcfgmgr.sys - burned into my brain) which occupied just enough of my 640k that most games would fail to start cause they couldn’t claim the whole lot.