How about Sanity - Aiken's Artifact. Thats a good ol classic RPG that had Ice T starring in it. Grant it, it was a action puzzle solving, game with a hilarious story and characters but it would be a great addition in here.

So Really:
Sanity - Aiken's Artifact
Aliens Vs. Predator
Oni
LHX Attack Helicopter
Stunts
And Original Battlechess.

Ravenloft: Stone Prophet.

Menzoberranzan

The two Dark Sun games, "Shattered Lands" and "Wake of the Ravager."

The Lands of Lore series. I only played "Guardians of Destiny," which I thought was profoundly silly, but it has a following.

GOG has now added my favorite old RPG here: Darklands. Since it has been added, I have played it for around 40 hours, and plan on much more. I just want to thank GOG again for making my year brighter. =D I look forward to the next old RPG's coming, of which there are still plenty more diamonds to be dusted off I daresay. 8)

^HINT: The name of the Pic I posted: Squint For IT...I think you all can figure out what IT is probably... :D
(I wouldn't just post a semi-pointless/redundant post like that without a reason...okay, maybe I would, but, not this time). ;-P
Happy playing... to someone. ;)

Thank you for this, one more game off the wishlist.

LOL 8-D It's amazing! Another person who almost won one of my contest getting a game I give away like this! :D I am happy you got it JMich, I still remember that story you wrote, and I did like it quite a bit. Hope you enjoy Darklands! :D