From publisher blurb:
This adventure has been designed for Shadowdark RPG through their 3rd-party license. The system is meant to be accessible to OSR players and modern players alike. Adapting the material to 5e or other systems is a simple affair.
In The Swamp Dragon Cult, the characters start their life as adventurers and their first stop is Strasterton. They quickly learn that a group of cultists has been terrorizing the capital and its vicinities for a few months now. Word is that the dragon in the local swamp region is their protector.
The characters are hired by the capital's authorities and they shall meet several NPCs during their stay in town. They learn about an upcoming attack on Eight-Towers Keep, which is close to the cultists' hideout. On their way, they can even make a small detour to meet Azmagollellos, the dreaded black dragon.
This is an adventure that has the heroes become the saviors of Strasterton and many other small settlements. They shall be the main authors in the eradication of the cult. However, they could meet the dragon's rage if they are not careful. The options are many, but one thing is certain. The poor people of Strasterton need the characters' valuable help to get rid of the nefarious Swamp Dragon Cult.