Easter Egg # 8
After you leave the inner circle and get to the main guy's office you pick up the tape. Two rooms after that there is his inner office. Shoot the painting off the wall and youll find a button. The couch raises up behind you which hides a staircase. Go down and youll find a big screen TV that will play a parody of a star trek episode. In the next room is a bed with chains on it and a closet full of bondage stuff.