Well, that wasn't the answer I expected! Super cool, I wouldn't have guessed any AAA titles were using a Lisp/Scheme heavily in their toolchain (but I'm not particularly knowledgeable about the game industry).

I'm fascinated by procedural generation and constrained randomness in games, and I'd think something like Racket would be a fun choice for that. Do you reckon you'd make the same choice if you were starting today?