The Game Options are the settings for the Chronicle. To access them, click on the small icon of two gears in the lower left corner of the game client. The Game Options have four settings: Music, Sound, Exit Game, and Log Out.
The first of these two, Music and Sound, are checkboxes to enable or disable music and sound respectively. Log Out, will log players out of their current session and place them back to the Login page. The last option, Exit Game, will forfeit your currently active Chronicle game, resulting in defeat.