Recently there has been a couple of comedic videos based around games, and the one over at Civilisation Anonymous is another great example (Direct Link).
Civilisation exploits that, just one more turn, element of turn based strategy games by always giving you something interesting to do or look forward to doing, in the next turn. Wither that by dropping a nuclear bomb on an enemy or completing another segment on your spaceship, its very addictive.
The only problem I have with Civilisation is that it requires far too much mouse clicking. Sometimes to complete the most basic of tasks there is like three mouse clicks or more involved.