Demona is a free, privately operated online game module for Neverwinter Nights, set on an island imagined as a world of adventure and wonder. Players can investigate demons, battle dangerous monsters, seek legendary treasure, and develop characters such as powerful wizards, fearless paladins, or nimble thieves. The module is designed for relaxed role-playing, with a maximum character level of 30, and is based on Neverwinter Nights version 1.71 with Shadoow CP. Its listed expansions are Shadows of Undrentide and Hordes of the Underdark.

Demona provides resources to help players join and understand the game, including frequently asked questions, technical and role-playing guidance, rules, and a glossary of terms. A downloads section offers the hak files required to run the module, along with other useful game files. The site also explains distinctive features of Demona’s world, such as its crafting and death systems and its spell adjustments. Players can connect with the community through the module’s forum and Discord.