Alright other then games I made (which would make it as obscure as possible)
I played this math educational game where you played a knight going through a dungeon solving math problems to give you attack boosts. You could even buy boosts to defeat the boss.
Though I am SURE I can think of something even more obscure without going into freeware or webgames or non-console or non-computer games.
Let me think... Stellar 7? Magic Pengel? Graffiti Kingdom? Estatica (I wish I could get the abandonware version working... I loved playing this when I was younger)
-I think my Father threw out all the non-cd games at a certain point. That certainly explains the many lost games... Such as Super Solvers (Goodness... lets say ALL OF THEM!) and several of his Leisure Suit Larry games. (Plus the original Incredible machine, one of the Lands of Lore games, Kings Quest 5-6, The horrible Robocop game, the horrible Lawmower man game, Simcity, Simcity2000, Ecoquest 2, Monkey Island 1 and 2)
--Though some of those may be CDs... since 7th guest was lost and it was a CD game
I got two CDs with at least a hundred between them... too bad it is lost. though most of the games were junk anyhow.
What about: "The Beast Within".
It really is one of the few gems of the Full Motion Video Adventure games. (Though I am SOO blunt to bad acting from watching Disney Channel that even Amazon Queen often seems Emmy Worthy)