Welcome to Team Fortress 2. After nine years in development, hopefully it will have been worth the wait. To listen to a commentary node, put your crosshair over the floating commentary symbol and press your primary
fire. To stop a commentary node, put your crosshair over the rotating node and press your primary
fire again. Some commentary nodes
may take control of the
game in order to show something to you. In these cases, simply press your primary
fire again to stop the commentary. In addition, your secondary
fire will cycle you through all the commentary nodes in the level. Please let me know what you think after you have had a chance to play. I can be reached at gaben@valvesoftware.com, and my favorite class is the Spy. Thanks, and have fun!