This gotta be the coolest port ever.
Grand Theftendo is a new homebrew game for the original Nintendo Entertainment System (NES). It is a tribute to Rockstar Games' Grand Theft Auto III running on the 8 bit, 256x240 resolution, 2 bit colour x 2 bit palette, 1.79 Mhz system, written entirely in 6502 Assembly Language!
Purely a project of my spare time, it has progressed very nicely. I had kept the development of it quiet until the very end of October 2004, in which GTA: San Andreas, and more importantly, GTA: Advance were released. After the release of GTA: Advance, a top down take on Liberty City, I decided there was no better time to show the world my efforts. It will still be a while before it's finished, but enough is done that it has something to show for itself.
Check the screens and read more at http://www.grandtheftendo.com