 In Part 3, Chapter 5 ("Providing A Service" Playstation 2 level): In  the small room after Alfred Wotens office (where you find the Aesir  building plans), there is a small picture that you can shoot off the  wall (behind the desk), revealing a button. Pressing it will raise  the couch on the other side of the room, revealing a staircase down  to a "private area". In it there is a big screen TV you can use to  play a 3DRealms