Homebrew Grand Theft Auto for the 8-bit Nintendo

Grand Theftendo is a port of Grand Theft Auto, a modern, graphics-intensive video game, to the Nintedo Entertainment System, an 8-bit game-system of relative antiquity. It's quite an amazing undertaking, funny and fun and kind of perverse. Here's a site with extensive details on the project as well as links to a Sourceforge repository of the code, so that you can modify it and create your own sequels.

Link

(Thanks, Nervous Pilot!)