Deus Ex: Invisible War Hints & Cheats

Depending on what you do during the game you'll see one of four main endings; here's how to get them:

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.

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.

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.

For some reason you don't lose your cloak when you throw things, so upgrade your strength and cloak.
When it is time to kill something turn on your cloak grab the heaviest object you can lift and chuck it at your target.
They won't be able to find you because you will still be cloaked so you can just keep throwing stuff at them.
This works great on the guys with power armor.

Unbeknownst to some, you can actually destroy those big green puddles of goo that Greasels leave behind in certain levels with Flaming Barrels or any fire weapon.

The first method involves using the Hellfire Boltcaster. First, you'll have to get it from the Nassif Greenhouse during your first visit to Old Cairo. All you have to do is aim directly for a puddle, and shoot to make it disappear. It's the only weapon that can destroy them directly, because only the Hellfire Boltcaster will show a health meter when aimed at the puddles.

As for using the flaming barrels or the Flamethrower, all you have to do is dump a dead/unconscious body on top of the puddles, and set it on fire using a flaming barrel or the Flamethrower. After a moment or two, the puddle will immediately disappear. I've tested & confirmed this with the Hellfire Boltcaster in the Antarctica Level, and with a flaming barrel & a flamethrower (plus a couple of unlucky SSC guards) in Apt. 22 of the Heron's Loft building in Lower Seattle. It may take a few shots more with the Flamethrower, but it WILL work.

This is a great help in levels like Antarctica or Germany, where Greasel puddles are scattered in certain areas in ways meant to obstruct your path.

Find the salesman selling the cure for Plague 11. He is next to flaming barrel in South Medina. Buy one soda at 20 Credits, and keeping going back and buying another and you'll notice your credits don't go down but you'll gain one free soda. Do this as long as you what one inventory slot maxes out at 50 for food. Note: It seems those sodas heal more health than normal soda.