If you use Twitter with any degree of regularity, chances are good that you have seen one or two posts in your feed about somebody assassinating somebody else. No, the CIA is not using Twitter to covertly reach out to its network of agents around the world -- the 21st Century equivalent of taping a white X in the window of a Prague coffeehouse. Those are updates from a Twitter-centric social game called Spymaster, created by iList, where gamers delve into an international realm of intrigue, propaganda, regime destabilization, and death. And how are such dangerous missions undertaken? By clicking buttons in a browser window.