You're probably not going to see a Portal 3 in the near future (Valve seems to have an aversion to third installments), but you're about to get the next best thing: a look at the prequel that never shipped. LunchHouse Software has received permission to produce a documentary series that reveals F-Stop (aka Aperture Camera), a prequel to the Portal series that was cancelled in mid-development. The initial video only shows basic game mechanics, but those already speak volumes.