Microsoft FreeCell

Microsoft FreeCell takes the deceptively simple card game and turns it into one of the most enduring forms of digital procrastination ever invented. The rules are easy to understand: arrange the cards into ordered foundations while using a limited number of free cells to keep the tableau under control. The catch is that nearly every card is visible, meaning defeat usually feels less like bad luck and more like a personal failure of planning. The Windows version became famous partly because it was bundled with the operating system, making it available to millions of people who had absolutely no intention of becoming card-game enthusiasts. Its quiet presentation and patient pace make it ideal for short sessions, although those sessions have a suspicious tendency to last much longer than planned. Sometimes the most dangerous game on a computer is the one that comes free with it.