Various cheats
     During  the game press the ~ (tilde) key to open the console then
type one of the following codes:

Cheat code:             Effect:
ClayburnFallmont        Full Ammo 
StanGable               Unlimited Ammo 
JeffersonDarcy          Add Hit Points 
AceEvans                Invisibility 
RogerPhilips            Call Artillary Strikes 
corbet                  Invisible
kariya                  Unlimited Ammo

Restore ammunition:
     After  running  out of ammunition or explosives during a mission,
press  [F11]  to save the game. Press [F12] and load the game that was
just  saved. All ammunition will be restored, as if you just began the
mission.