All right, here are the last two hints I've got:
#6: Rotating LSD trip mindfuckery, incompetent sidekick, red and blue balls.
#4: A reenactment of a scene from a previous game, the blooper reel of a reenactment of a scene from a previous game (with an ill-tempered director), an awesome rock concert, a (completely accurate) depiction of evolution, and the only thing I would want to watch on an American football field.
All that for saving a tree.