Very creative early module for the game AD&D. While a classic dungeon crawl, in practice it was quite inventive. The dungeon is a crashed spaceship, a concept the characters would not have even though the players would. To help simulate the character's lack of technological know how the devices encountered were all oddly designed, usually against the expectations of the players.
One of the first, and strangely enough only, adventures to have a large number of visual aids. The art was pretty good, and in my experience was quite popular with both players and GMs.