The majority of the maps in the game are unchanged. Hommlet, the moat house and its dungeon, and the temple and its dungeons are almost exactly as described in the module, with the same layout found in the original. However, the map for the village of Nulb has been changed significantly. The original map showed many buildings, most with no descriptions and no associated NPCs. Nulb has been reconfigured into a smaller and tighter design, while at the same time, the number of NPCs has been increased, and the existing buildings have gained more details.

The elemental nodes (extra-planar realms that have been called into existence by evil forces) have been changed. In the original module, these maps were huge (almost half a mile across for the Air and Water nodes), and the resident creatures were not explicitly placed. Furthermore, several powerful magic items were guarded by relatively weak elemental grues. In the new design, the maps were made to the same scale as the rest of the temple dungeons, and the element-specific monsters were placed with more care. In addition, appropriately powerful guardians now guard the powerful magic items.