The evidence? A single, blurry photo posted to Usenet in 1999. The post read: "Found this at a garage sale. Looks like Halo for the 2600. Anyone have a Supercharger to test this?"
In 2010, former Microsoft VP Ed Fries (the "father of the Xbox") created an actual homebrew Atari 2600 game called Halo 2600 . He did it as a personal challenge and a tribute. And it is real .
But here is the beautiful part:

