Through the Mines of Moria begins at the western doors leading into Moria, taking players through several encounters with servants of the Shadow, and culminates with a climactic battle against the dreaded Balrog. This introductory game contains a 32-page adventure narrative, a 24-page guide to the lands and peoples of Middle-earth, an explanation of the basic principles of role-playing games, full-color character sheets that include pictures and game data describing each character, four full-color tactical maps for use in the major action sequences of the adventure, cut-outs of the characters and monsters in the adventure, and a poster map of Middle-earth.