I hope you like CRPGs and Dungeon Crawlers
Gothic 1 and 2 and maybe 3
Deus Ex
Diablo 2
Baldur's Gate
Daggerfall (search daggerfallsetup so that you don't have to spend hours messing with DOSBox)
Morrowind
Dungeon Crawl: Stone Soup
Mount & Blade: Warband