If You Ever Wanted Wolfenstein 3D On Game Boy, Here You Go
Wolfenstein 3D is an excellent game. One of the best. So it's no surprise Swedish programmer Anders Granlund took it upon himself to get Wolfenstein 3D to work on a Game Boy Color. But since he couldn't actually port the game over, he went ahead and created his own Game Boy cartridge from the ground up instead.
Granlund has been documenting the process the entire way over here at his official page, going so far as to create his own custom box for the cartridge, a sticker and casing for it, and various shortcuts and tricks to bring the project to life. Honestly, following it on the main post really boggles my mind, because it's amazing to me the work one person can accomplish if they want somethng this badly. And this is certainly a game that should already have found a home on the Game Boy Color.
Check out some of the work in progress below and see ther rest at Granlund's page!