Arcadia/Starpath Supercharger

If you have a crappy MP3 player on hand you can just load it up with the Stella Gets A New Brain audio files (They're all over the internet), Plug in the Supercharger and it will actually read the files and play the games, and it's still much cheaper that buying S.G.A.N.B. or any of the other games physically, though I would recommend you buy some of them just for the box art alone.