By 
While ingame, press ~ to display the console, then type these cheets:
Invincibility (5 minutes) – painkiller
Maximum health and armor – turtle
Give weapons and extra ammo – toolup
Director mode – jrtalent
Lower wanted level – lawyerup
Raise wanted level – fugitive
Recharge ability instantly – powerup
Super jump – hoptoit
Faster running – catchme
Faster swim – gotgills
Flaming bullets – incendiary
Explosive bullets – highex
Explosive melee attacks – hothands
Slow-motion mode – slowmo
Slow-motion aiming – deadeye
Skyfall – skyfall
Drunk mode – liquor
Slippery cars – snowday
Low gravity – floater
Change weather – makeitrain
Spawn BMX bike – bandit
Spawn Buzzard attack helicopter – buzzoff
Spawn Caddy (golf cart) – holein1
Spawn Comet – comet
Spawn Duster (crop duster plane) – flyspray
Spawn Limo – vinewood
Spawn Parachute – skydive
Spawn PCJ-600 – rocket
Spawn Rapid GT – rapidgt
Spawn Sanchez – offroad
Spawn Stunt Plane – barnstorm
Spawn Trashmaster – trashed
