D&D campaign that takes the players from level 5 to level 13, and from a small agricultural region to Hastur's private plane of madness, Carcosa. This edition is a compilation of DNH1, DNH2, DNH3, DNH4 and DNH5 and is for OSR Compatible Systems (TSR Era editions and their retroclones like S&W, OSRIC, LL and C&C among others)