If Steam Wallet is non-functional in game (you press the Steam Wallet button and nothing happens) or the Steam overlay doesn't appear when you press shift-tab here are some things you can try. Ensure Steam Overlay is enabled Make sure that the Steam overlay is enabled while in game. To do so, bring up the Steam properties (Windows) or settings (OS X) via the Steam menu. Select In-Game and then tick the "Enable the Steam Overlay while in-game" check-box. On OS X, enable Universal Access 1) Open System Preferences, go into "Security and Privacy", select Steam from the list and hit the - button to remove it. Then quit and restart Steam. Once Steam prompts you for "Universal Access", go turn it back on. 2) If that doesn't work, you may have to do some system hackery with Terminal, following the instructions here: http://forums.macrumors.com/threads/fix-for-steam-universal-access-glitch.1767253/ Quit Steam Close System Preferences Open Terminal and paste in the command: sudo sqlite3 /Library/Application\ Support/com.apple.TCC/Tcc.db 'delete from access where client like "%Steam%"' Go back into "Accessibility" under "Security and Privacy" in System Preferences and make sure Steam isn't listed. Close System Preferences Start Steam. When you start a game, Steam should ask you to turn on "Universal Access" for the Steam overlay. Use that to open System Preferences again. Check the box next to Steam if it isn't already checked and close System Preferences. Ensure game is running in direct render mode This should be the default, but if you changed the game to render in cpu mode (, this will prevent the Steam overlay appearing. You'll need to change the game back to direct mode or purchase through our web client (see below). Use Paypal through web client If you still can't get the wallet overlay to appear, you can purchase through Paypal via our web client at: http://game.cardhunter.com/ You will need a password to login via the web which you can set through the in-game menu options.