ok possibly not as good as demon attack but…
Halo 2600 is a new game for the (very old) Atari 2600 game console written by Ed Fries. It is an attempt to answer the question: “What might Halo have looked like if it was written in 1977 when the Atari 2600 was first released?
What is also cool is they have actually produced a limited run of something like 100 Atari 2600 cartridges of the game!!! WANT!!!