11. Doctor Who, Zelda & Mayan Prophecy Trophies (Ghosts)
Talk about including the most sporadic collection of influences out there - where else would you see a shelf paying tribute to The Legend of Zelda, Doctor Who AND a the ancient doomsday 2012 prophecy? Located on the Federation Day mission, delve into the offices inside the skyscraper and you'll locate it. Brilliantly, the Zelda trophy is in the shape of a Rupee (the currency from the games), Doctor Who's is the TARDIS (complete with the etching "Award for Largest Interior With Smallest Exterior"), and the Mayan one has a tablet-theme with "Given For: World Not Ending 2012" on the front.
