Check Out This 8-Bit Halo Demake
You can download the game right now and play it on your PC, along with an 8-bit version of Left 4 Dead. Creator Eric Ruth also has an 8-bit DJ Hero, but sadly, Activision caught wind of it and disappeared it with a cease and desist.
I sat down with Pixel Force Halo and it’s actually pretty fun, although there’s no save feature or password system. You’ve got to play it in one go, so expect to spend a little time. It covers the story of the original game and includes all of Bungie‘s missions with run-and-gun Contra-style gameplay.