I was curious to see if there was any information on the level editor Lucasarts used for Jedi Knight titled "Leia". I came across this article which was written by Robert Huebner (senior programmer for LEC) where he explains the COG language. Quite interesting to any gaming programmer.
http://nasla.yonsei.ac.kr/~neurok/link_docs/OnlineGame/199709_AddingLanguagesToGameEngines.pdf
http://nasla.yonsei.ac.kr/~neurok/link_docs/OnlineGame/199709_AddingLanguagesToGameEngines.pdf