I am building a computer for retro windows games. What are the benefits between Windows 95, 98, and ME? And are there some old games that would only work on one or two of those OS?
Windows 98 would be your best bet. It should be compatible with all DOS/Win9x games. Windows ME was and probably still is pretty unstable - if you can, go for Windows 98 SE
Yes its definitely either Windos 95 or 98. It would be great if you could have both of them running at the same time. Have fun! Did you finish building your computer?