as far as its been taken, yes but i wouldn't say i have done it.
i agree that the power boxes mean something and have a purpose, my point was lets simplify and use logic to solve this, it doesn't necessarily have to be so complicated.
the group i play with and i regularly try these steps in different orders:
-hit the 7 red and green boxes.
-set off all the traps at once.
-collected the 3 film reels.
-shot 2 radios.
-hit or shot all the bags of rubbish and stacks of paper.
-launched the rocket in the pentagon teleporter room.
-unlocked the song
-have all perk a colas and 2 PaP guns each with so many different combinations.
and we are yet to find anything different happening, which doesn't make our attempts are the be all and end all.
has anyone done much looking into the 115 weapons?