Crysis cheats and cheat codes for PC

Cheat mode:
Note: Always make a backup copy before edit a game file. The following 
cheats may also be use in the demo version of Crysis.

Locate the "diff_normal.cfg", or "diff_hard.cfg" or "diff_easy.cfg" 
files in the "\crysis\game\config\" directory. These files are the 
configuration files of the three difficulty level.

diff_normal.cfg - Normal difficulty level configuration file
diff_hard.cfg - Hard difficulty level configuration file
diff_easy.cfg - Easy difficulty level configuration file

If you want to play under Hard difficulty edit the diff_hard.cfg
file with a text editor. Insert the following lines to activate 
God mode and enable infinite ammunition:

g_godMode = 1
i_noweaponlimit = 1 
ai_IgnorePlayer = 1
i_unlimitedammo = 1

More cheats:
Set the numbers to the indicated value or insert any of the following 
lines to the configuration file to activate the indicated cheat effect:

-- Player Health/Energy/Suit

// Replenish health quicky
g_playerSuitArmorModeHealthRegenTime = 0

// Replenish health quicky while moving
g_playerSuitArmorModeHealthRegenTimeMoving = 0

// Change difficulty, 1 is the easiest, 4 is most difficult
g_difficultyLevel = 1 

// No more energy loss
g_suitCloakEnergyDrainAdjuster = 0

// Free energy
g_suitRecoilEnergyCost = 0

// Faster running
g_suitSpeedMult = 2.85

// Additonal armor points
g_suitArmorHealthValue = 900.0

// Set health regen time to 0
g_playerSuitHealthRegenTime = 0

// Set regen time while walking to 0
g_playerSuitHealthRegenTimeMoving = 0

// No waiting until regen starts
g_playerSuitHealthRegenDelay = 0

// Instant energy
g_playerSuitEnergyRechargeTimeArmor = 0

//Instant energy while moving
g_playerSuitEnergyRechargeTimeArmorMoving = 0

// Set energy regen time to 0
g_playerSuitEnergyRechargeTime = 0

// Do not wait until energy regen starts
g_playerSuitEnergyRechargeDelay = 0

// Additional health
g_playerHealthValue = 900.0

// Instant energy
g_playerSuitEnergyRechargeTimeArmor = 0

//Instant energy while moving
g_playerSuitEnergyRechargeTimeArmorMoving = 0