Recently thanks to Modern Vintage Gamer on youtube, there has been a push to see if you could get Doom to run on the NeoGeo. Because of its very unique hardware (no framebuffer) it is a very unqiue and tough task.

And yet, some folks have come to the battle and have ended up extensively using LLM's to code it. It is wild to see that these things can target such an obscure platform and get some decent results in a very short amount of time.

https://www.youtube.com/watch?v=WPxhuKTltsk

This is something that doesn't have any real economic value but many are more than happy to see happen.