Yesterday at work, I was somehow reminded of an old Castlevania fan game I played years ago, and now I can't stop thinking about it. It was actually a 3D game, but with really blocky, primitive graphics. I think your character basically looked like a 3D version of the sprite from Simon's Quest. I think I found it here on the Dungeon forums, but way back when they were hosted on Gamespy or whatever it was. If anybody remembers what I'm talking about, any help at all would be greatly appreciated!
EDIT: I found it. Apparently they made two games: Castlevania Quest Horror and Castlevania Quest 3D. Trying to track down the downloads now.
http://youtu.be/1bRkXW82S_E