Purpose: Holds text, images, and tokens for an adventure, rulebook, reference, etc. It is displayed in the library, story lists, as well as under individual sections such as items, images, NPCs, etc. Modules are normally marked with compatibility for a specific ruleset, or set of rulesets.
File format: Zip file with the extension name changed to mod.
Purpose: Extensions are loaded after a ruleset and they override the base functionality and/or graphic layout of the base system. They can be used to provide a new skin, or theme. They can also add, remove, or modify functionality. They are loaded by the Gamemaster (GM) and players connected to the GM will see the player version of any extension.
File Format: Zip file with the extension name changed to ext.
Purpose: A ruleset provides the graphical design and functionality for a game system. These rulesets can inherit from other rulesets, such as the built-in CoreRPG ruleset, in order to provide a base level of functionality common among all other rulesets. A custom ruleset will often define what the character sheet looks like, what data fields are important for game elements, such as NPCs, items, spells, etc., and also custom automation to help speed up and improve gameplay.
File format: Zip file with the extension name changed to pak.