I thought this was rather odd ... (from the IMDB.com trivia for the 1985 movie Real Genius: http://us.imdb.com/Trivia?0089886)
The writings on the walls in the steam tunnels ("light your way", etc) are references to the game "Wizardry" and it sequels, in which clues can be found scrawled on the walls of the dungeon. The ending credits contain: "Thank to Sir-Tech, for Wizardry".
Funny how two things I enjoy so much (I have always loved this movie) are intertwined, and I never knew it.
Tools for Wizardry(r) 7