Here is a port of the really cool Color Computer game Dungeons of Daggorath. Richard Hunerlach wrote this a few years ago and I took his code and made a Mac OS X port. You have to have SDL and SDL_Mixer installed for the game to work.
Macintosh Dungeons of Daggorath version 0.4.0
This game has now been ported to Javascript (using emscripten). http://daggorath.online/