Locate the difficulty files in your Crysis installation folder (ie: C:Program FilesElectronic ArtsCrytekCrysisGameConfig). 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.
i_unlimitedammo = 1
ai_IgnorePlayer = 1
Enemies Ignore You
i_noweaponlimit = 1
Carry Unlimited Number of Weapons