And Linux makes three: three platforms supported by the Conclave desktop client, that is. Along with Windows and Mac, you can now download the client for Ubuntu (12.04 or later) and Arch distributions.
To install it, just download and extract the .tar.gz file, which will create a directory containing the client and its supporting files. Run the "conclave" executable within this directory to launch the client. The directory also includes a README with additional information. If you run into any problems, please let us know over in our Issues forum.
Happy adventuring!
About Conclave
Conclave is a tabletop-inspired, cross-platform RPG that mixes turn-based combat encounters with story choices determined by your characters' traits and actions. It supports both solo play and co-op parties of up to four players, who can adventure together in real time or take their turns asynchronously whenever they have a free moment. You can find out more information or play the game in your browser at playconclave.com.