Card Game Simulator

Create, Share, and Play

CGS Custom Games

Card Game Simulator allows users to create, share, and play custom card games.

CGS Core Concept

A custom game in CGS is a specification for a collection of information about a card game. This information primarily includes sets of cards and a definition of what properties those cards have. Ancillary information can include decks and boards to use with the game. See below for the full specification.

CGS games directory

Custom games are created with a new folder within the persistent games data directory. The location of this persistent data directory varies depending on platform. Some examples include:

Custom game folder structure

The structure of this custom game folder is:

JSON File Structure

The GGS AutoUpdate Url that is used to download a card game is actually a pointer to the Game:Name.json file. CGS generates the rest of the folder structure based off that CardGameDef.json file.

You can create your own json and validate against these schema:


The default examples can be found in the CGS GitHub Repository. Further examples can be found in the CGS Google Drive folder.