Originally released on PlayStation in 1997, Final Fantasy VII was within a year ported to Windows PCs and released in June 1998. It's a bit long-in-the-tooth, sure, but has always had a dedicated community of modders doing bits and bobs: one nut has proven especially tough to crack, however. The game is locked at 15 frames per second.
This is a particular problem with the original PC version because of the UI, which ran at a higher framerate in the original PlayStation version and also factors into certain later attacks...