ahh. i know racket was plt scheme originally. but from my understanding, naughty dog was using their own lisp/scheme and now no longer uses that system.
Naughty Dog used a custom Scheme system for their early games. That one was written in Allegro Common Lisp.
When they were bought by Sony, they abandoned their tools and moved on to C++, hoping to share code with the rest of Sony game developers. Didn't work out as wished. They brought Scheme back into their game development, but differently. For example:
i have seen that presentation, but i am fairly certain i recall from an uncharted 4 chat with a naughty dog developer that they no longer use that system once they moved to the ps4. this is in large part, i believe, due to their being a technology developer for multiple sony studios.
My understanding is that they are currently using Racket, but I don't work there. This is often mentioned in the Racket community, I think one of the ND engineers spoke at a lisp conference recently about it.
