If you are having performance issues with the steam client (poor frame rate in particular), the first thing to do, as always, is to make sure that you have the latest drivers for your graphics card. If you find that that still doesn't fix the problem, you can try changing the render mode for the game. To do so, you will need to location the AIR application.xml file. This can be found in different locations on Windows or OS X. Windows default: C:\Program Files\Steam\SteamApps\steamapps\common\CardHunter\META-INF\AIR\application.xml or, if you installed to a custom steam library folder: <your steam library folder>\SteamApps\steamapps\common\CardHunter\META-INF\AIR\application.xml OS X default: /Users/<your user name>/Library/Application Support/Steam/SteamApps/common/CardHunter/CardHunter.app/Contents/Resources/META-INF/AIR/application.xml You'll need to edit this file and find the line that looks like this: <renderMode>direct</renderMode> Change this line to: <renderMode>cpu</renderMode> Save the file and restart your client.