D is still playable mostly thanks to it interesting concept. But there are so many titles here that I have really never heard about. Games you never have time and will to check them all.

I remember playing the demo of Flying Saucer. At the time it seemed awesome :)

I also have Chasm: The Rift and I remember having Get Medieval, dunno where it is now.

The first CRPG I ever played was a DOS game called Challenge of the Five Realms, which is an Ultima-ish precursor to Baldur's Gate. It's still one of my favourite RPGs.

Because I'm a total nerd I remembered some more.

http://www.mobygames.com/game-group/quarantine-series
http://www.mobygames.com/game/windows/attack-of-the-saucerman
http://www.mobygames.com/game/dos/powerslave
http://www.mobygames.com/game/twin-dragon
http://www.mobygames.com/game/wanton-destruction
http://www.mobygames.com/game/windows/return-fire
http://www.mobygames.com/game/dos/mass-destruction
http://www.mobygames.com/game/dos/seal-team
http://www.mobygames.com/game/dos/deadline_
http://www.mobygames.com/game/dos/alpha-storm
http://www.mobygames.com/game/dos/last-rites
http://www.mobygames.com/game/dos/anvil-of-dawn
http://www.mobygames.com/game/dos/eradicator
http://www.mobygames.com/game/dos/2400-ad
http://www.mobygames.com/game/dos/bad-blood
http://www.mobygames.com/game/dos/escape-from-hell
http://www.mobygames.com/game/dos/in-pursuit-of-greed
http://www.mobygames.com/game/dos/hired-guns
http://www.mobygames.com/game/dos/amulets-armor

Too many games man...