I'm looking for hacks along the lines of Castlevania Remix or Super Greyscale Brothers that use a very limited amount of (preferably similar) colors for the graphics. Does anyone know of any such hacks?

Alternatively, I'd be interested in hearing about any non-hacked games that do the same. (I'm *not* looking for games that use Night Vision Goggles or other such items that render the graphics in a single hue.)