[anon9001]

If you like this, you should also check out the work around Retro City Rampage. RCR is a GTA1 clone for multiple platforms from a few years back, but the developer also made a real NES ROM of it. Here's a great talk about that process: https://www.youtube.com/watch?v=Hvx4xXhZMrU

(I'm not related to the project, but it's one of the few games I've 100% completed because it was just so good)

[djmips]

I don't think they finished the NES version?

[anon9001]

Sort of, it's in the game as an emulated ROM: https://www.youtube.com/watch?v=ZffFxLyD4Ig

[djmips]

Prototype version, as in unfinished, too bad. But it's cool it's an Easter Egg.