games I would like to revisit are:
C&C 1 or Red Alert
Primal clickfest fun,very imbalanced, no one uses allies in mp if memory serves me right, epic tank battle(literally there can be hundreds of tanks on screen), plus crystal-clear unit voices that were pretty rare in RTS games at that time. With 320x200 resolution in DOS, a mammoth takes up to 1/4 of the screen lol
Dungeon Keeper 1 or 2
Very innovative RTT or FPS combo, too bad it doesn't work very stably on 32bit windows, hopefully there will be a fan-made patch to rectify that problem.
System Shock 2 coop
It's not for faint-hearted like me in single player mode, but with buddies backing you up, suddenly the zombie stalkers becomes prey.