To celebrate the 20th anniversary of the release of Quake last month, a new episode was released, called DOPA. It was developed by Machine Games, who created the Wolfenstein: The New Order DLC, and it's available for free. https://t.co/BTgju8tLuI We're playing it on OSX using the Dark Places engine: https://icculus.org/twilight/darkplaces/ Dark Places runs on Windows, Linux and OSX.