Crysis 2 Cheats :

Bang Bang Bang !!!
Here's the next part !!!
Double the Awesomeness !!!!
I presesnt to you......Crysis 2 !!!!

Open the cheat console window by pressing ~ (or the key above Tab),
then enter con_restricted 0 and hit Enter. Now you can enter the
following cheats:

Code                                        Effect
------------------------------------------------------  
g_godMode = 1                             - God mode
g_infiniteAmmo = 1 or i_unlimitedammo = 1 - Unlimited ammo
g_infinitesuitenergy=1                    - Unlimited Suit Energy

~The CompetentStudent