Lua is ubiquitous in game programming (as a scripting language), see e.g.: http://en.wikipedia.org/wiki/Category:Lua-scripted_video_gam... or browse through some game programming related job openings.
I would assume that LUA was a way to move towards something common as a scripting language in GrimE.
http://en.wikipedia.org/wiki/SCUMM http://en.wikipedia.org/wiki/LucasArts_adventure_games#3D_gr...
"Soon after the article in Dr. Dobb's, we received several messages about Lua. One of the first messages was the following:"
From: Bret Mogilefsky <mogul@lucasarts.com>
To: "'lua@icad.puc-rio.br'" <lua@icad.puc-rio.br>
Subject: LUA rocks! Question, too.
Date: Thu, 9 Jan 1997 13:21:41 -0800
Hi there...
After reading the Dr. Dobbs article on Lua I was very eager to check it
out, and so far it has exceeded my expectations in every way! It's
elegance and simplicity astound me. Congratulations on developing such
a well-thought out language.
Some background: I am working on an adventure game for the LucasArts
Entertainment Co., and I want to try replacing our older adventure game
scripting language, SCUMM, with Lua.
[...]
http://www.lua.org/history.htmlIt's kind of a small point, I just don't want somebody to get the idea to write an actual game engine in lua.
That's how I learned it was using Lua. I believe it was the first large scale use of Lua in a game, certainly the first I encountered.