In Search of the Unknown was an introductory scenario intended to teach Dungeon Masters (DMs) how to create dungeons. Mike Carr intended it for use as an instructional adventure for new players. The module is a beginner's scenario, which allows the DM to add their own choice of monsters and treasure. The module is coded B1 because it was created as the first adventure for the Dungeons & Dragons Basic Set, though it is possible to convert it to Advanced Dungons & Dragons. The adventure is designed for characters of first to third level, and was written for DMs and players with little or no gaming experience.