2016 · 核心规则（开始对局的最低要求）

The Nightmares Underneath Free Edition

An old-school role-playing game set in a fantasy Middle East where otherworldly nightmare incursions threaten civilization. Characters explore dungeon-like manifestations, fight their creatures, and recover the treasure anchoring each incursion to the physical world before it grows more dangerous. The rules use six attributes, classes, levels, memorized spells, and experience for treasure. Damage reduces a daily Disposition score before affecting attributes and causing lasting injuries or nightmare curses. Players also manage initiative, alignments, social institutions, community resentment, and the consequences of spending their dungeon wealth. The free edition contains the complete game, including procedures for creating incursions, monsters, and spells.