Dunjonquest: Upper Reaches of Apshai (1981) is the first expansion module for Temple of Apshai, adding four new dungeon levels and 150 additional rooms to explore. Set above the original ruins, the game introduces fresh story elements surrounding Benedict’s monastery and the cottage of Merlis the Mage — offering a touch of narrative intrigue alongside traditional dungeon crawling. Gameplay remains consistent with the original: players guide a lone adventurer through top-down dungeon maps, battling monsters, avoiding traps, collecting treasure, and gaining experience. Characters from Temple of Apshai can be carried over, preserving progress and deepening continuity. While core mechanics and visuals remain unchanged, Upper Reaches expands the world meaningfully, giving players new challenges, rooms to map, and a richer sense of place. It cemented the Dunjonquest model of building modular adventures around a shared engine, setting the template for future expansions and role-playing enhancements in the series.

This isn’t a sequel, it’s an expansion pack and requires the Temple of Apshai disks in order to use it.  Like the other titles, it included rich room and treasure descriptions (see the manual).  For a modern adaptation, this could easily be included (as it was with the Trilogy) with Temple of Apshai, and all of the rooms and descriptions could be integrated in the gameplay, or vividly illustrated.