Keep on the Borderlands was an introductory module for the Red Box (Basic) version of the non-Advanced Dungeons & Dragons. As the module packaged in with the majority of the Red Box sets, it became one of the most run-through modules in D&D and one of the most popular.Set in the Known World of Mystara with the majority of the other BECMI rulebooks and adventures, the Keep was intended to provide a "home base" for beginning adventurers and provide them with numerous adventure hooks to take. The majority of the hooks involve the Caves of Chaos located not far from the Keep. Unlike many of the other popular modules, Keep on the Borderlands did not have a strong central storyline or theme: it relied instead on providing a Wide Open Sandbox feel, allowing the characters to wander in the wilderness or find trouble in the Keep itself if the multitude of options in the Caves were not enough to keep them entertained.Keep has been critically acclaimed in its time, named by players as one of their favorite modules and awarded by Dungeon Magazine as the 7th best D&D adventure of all time in a 2004 issue.A novel was released in 1999 along with other classic adventures. A sequel, Return to the Keep on the Borderlands, was released 20 years later for 2nd Edition D&D, given the name Kendall Keep, and controversially relocated to Greyhawk. Return took place two decades after the original. A version for Hack Master, entitled Little Keep on the Borderlands was released in 2005, and served as a "parody" of the original.The name was reused in 2010 as part of the D&D Encounters program, this time giving the Keep the proper name of Restwell Keep and locating it in the Nentir Vale.
Tropes in the Original Module