Julian writes -
Coolest Altoids/Tin mod I’ve seen. This guy (Greg Sanders) made a portable game box that plays a rogue like game. He uses a Genesis controller to control the actual game, but I’d bet with a little work the entire unit could be entirely self-contained (by using a tipping-disk for directional control and one button for action). See here too (a pretty cool site itself) for useful controller schematics.
Dungeons of Doom by Greg Sanders – Link.