God Mode:
During the game press G, O and D at the same time then type 'IMMORTAL' and press 'enter'.
All Guns and Ammo:
During the game press G, O and D at the same time than type 'allammo' and press 'enter'.
A smart reticule that turns red when over a target:
'RETICLE'

Third Person View when on Foot:
'CAMERA'

No Car Geometry:
'CAROFF'
Targeting for Weapons while on foot:
'TARGETS'

Double Damage while on Foot:
'DMDAMAGE'

Gives you Radar on Foot:
'RADAR'

Changes Car to Running Person:
'STONEAGE'

Toggle on/off Car Wheels:
'WHEELSOFF'
All Car Weapons:
'CW'

Max car ammo:
'CA'