In 1983, Rescue on Fractalus and Ballblazer, the first releases from Lucasfilm Games, were built with a system written in Lisp. It was a 6502 assembler with Lisp syntax and a Lisp-style macro facility, written in Portable Standard Lisp, running in Berkeley Unix on a 4MB VAX 11/750. Unfortunately it was eventually abandoned because the developer had left and it was a bit of a strain on the VAX that was shared by the whole development team.

Yes, I wrote it. Yes, it was my first non-academic programming job. Yes, the users complained about the parentheses, and the slowness. But, they also took advantage of the powerful macro facility.