Jagged alliance - Best war turn based rts
Dungeon Keeper - Awesome unique game, next closest would be majesty
Vol
Doom
Sim City 1 on Amega
Defender of the Crown
Starcraft
Homm
Red Alert

Gods - The one and only action game i was extremely addicted too. http://takegame.com/action/htm/gods.htm (Wonder if there are any similar games around)

Played tons but these are at the top of my head.