The fourth game in
the Elder Scrolls series, and arguably the best game in the history of mankind. By purchasing this game, you have sold your soul to Bethesda Softworks--which is a pretty even trade-off, actually. Once you start this game--assuming your computer/Xbox 360 doesn't burst into flames of righteous fury due to it's lack of uberness-- you will not be seeing the sun for a while.
Side effects include: Weight loss, paleness of skin, weight gain, reluctance to leave your chair, death, peeing in a bottle,
ordering pizza every night
because you can't stop playing long enough to make some food, loss of the ability to distinguish between fantasy and reality