Unlimited Speed Suit Energy - When you're out of game, find your Crysis config folder, located in something like "C:\Program Files\Electronic Arts\Crytek\Crysis\Game\Config" Find the .cfg file called diff_(Whatever difficulty you play at.) and make it editable with Notepad. Open it, and you should see some lines of code. I advise you to make a copy of this file just in case you screw something up and forgot what the default was.

Now, there should be a line in there near the bottom that says this:
"g_suitSpeedEnergyConsumption = 110"

Edit that 110 to be 1. Save the file, and now go play Crysis zooming past each level.

Password

g_suitSpeedEnergryConsumption = 1 Makes you never run out of energy whilst using the speed suit.

God Mode

Locate the difficulty files in your Crysis installation folder (ie: C:\Program Files\Electronic Arts\Crytek\Crysis\Game\Config).
These files are called diff_easy.cfg, diff_normal.cfg, diff_hard.cfg and diff_bauer.cfg. Open the file (with Notepad) that corresponds to the difficulty level you are playing.

Add the following line to the end of the file and save it:

g_godMode = 1

Now, when playing your health will still decrease but you will not die. Instead, your health and armor will automatically replenish when your health reaches 0.

Using the same method as above, add the following lines to the end of your config file for the corresponding effect:

Code: Result:

i_unlimitedammo = 1 Unlimited Ammo
ai_IgnorePlayer = 1 Enemies Ignore You
i_noweaponlimit = 1 Carry Unlimited Number of Weapons