@hankchad You aren't alone. I am trying to figure out that same thing. I went to Retroarch and found where it mentioned the esc key. I bound a arcade button to that same command which is Exit Retroarch. Of course, that didn't work. It will close Retroarch but will not exit from a game.
Contributions to the project are always appreciated, so if you would like to support us with a donation you can do so here.
Hosting provided by Mythic-Beasts. See the Hosting Information page for more information.