7. Desert Bus (from Penn & Teller's Smoke and Mirrors)
Penn & Teller's Smoke and Mirrors was an unreleased game, originally planned for release on the Sega CD in 1995, which has obtained cult status due to the presence of a truly astonishing minigame contained within it - Desert Bus. The objective of the game is to drive a bus from Tucson, Arizona to Las Vegas, in real time, at a maximum speed of 45mph, along a road which is, without exception, perfectly straight; a feat which requires 8 hours of continuous play to complete. Oh, and you can't pause it. There are no passengers, little scenery bar an occasional rock and an exciting bug splat 5 hours in. The killer is that the bus veers slightly to the right, meaning that it cannot be left to drive by itself - and if you leave the road, you'll be towed back to Tucson - in real time. Making it to Vegas scores...1 point and the maximum score is 99 points - which would require over 41 days of continuous play to achieve. Its cult status has led to marathon charity events to see how long people can drive for. Desert Bus is, without doubt, an absolute triumph of boredom.