Deus Ex - Invisible War
Unlock Thief III Trailer:
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To unlock the Thief III trailer, beat the game on any
difficulty with any ending. Then, on the main menu, go
to Options. Select "Extras" to view the trailer.
Secret Wrap Party Level:
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While you are in the UNATCO Ruins, the first large room you
come into, you will see a Flag. Pick up the Flag, and go to
the room where that used to be Joseph Manderly's office.
Look around, and you should see a bathroom. Put the UNATCO
Flag on the floor so it stands up, and flush the toilet.
A message will come up, and you will be transported to the
Developement Team Wrap Party, which is set in Club Vox.
Ladders:
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When climbing up a ladder you put away your weapon, but if
you hit b to pull it back out you can climb the ladder with
your weapon out and usable.
Mega-Jump:
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Position yourself a few feet from a low lying object (stairs
[recommended], seat of a couch, non-movable bench, or others
about the same height) and start running towards it. Just as
soon as you start to walk over it, jump. You should jump 2-3x
as high as usual.