At least http://xkcd.com/426/ http://xkcd.com/426/ has plenty of implementations, including http://cannonerd.wordpress.com/the-tablet-of-adventure/ http://canno

At least http://xkcd.com/426/ http://xkcd.com/426/ has plenty of implementations, including http://cannonerd.wordpress.com/the-tablet-of-adventure/ http://cannonerd.wordpress.com/the-tablet-of-adventure/