Player Ability
Money ($100,000) cheese
Weapons letsrock
Golden Gun (one-hit kills) goldengun
Infinite sprint runfast
No vehicle damage vroom
Repair car repaircar
Add respect whatitmeanstome
Add police notoriety pissoffpigs
No police notoriety goodygoody
Add gang notoriety lolz
No gang notoriety oops

Vehicles
Spawn Ambulance giveambulance
Spawn Anchor giveanchor
Spawn Attrazione giveattrazione
Spawn Bootlegger givebootlegger
Spawn Challenger givechallenger
Spawn Commander givecommander
Spawn Condor givecondor
Spawn Eagle giveeagle
Spawn Estrada giveestrada
Spawn F69 Vtol givevtol
Spawn Gatmobile givegatmobile
Spawn Kaneda givekaneda
Spawn Kenshin givekenshin
Spawn Knoxville giveknoxville
Spawn Krukov givekrukov
Spawn Miami givemiami
Spawn Municipal givemunicipal
Spawn Nforcer givenforcer
Spawn Peacemaker givepeacemaker
Spawn Phoenix givephoenix
Spawn Quasar givequasar
Spawn Reaper givereaper
Spawn Sandstorm givesandstorm
Spawn Shark giveshark
Spawn Specter givespecter
Spawn Squasar givesquasar
Spawn Status Quo givestatusquo
Spawn Taxi givetaxi
Spawn Titan givetitan
Spawn Toad givetoad
Spawn Tornado givetornado
Spawn Vortex givevortex
Spawn VTOL givevtol
Spawn Vulture givevulture
Spawn Widowmaker givewidowmaker
Spawn Woodpecker givewoodpecker

Weapons
Spawn 45 Sheperd givesheperd
Spawn Apocafists giveapoca
Spawn AR 55 givear55
Spawn AS3 Ultimax giveultimax
Spawn Baseball Bat givebaseball
Spawn Chainsaw givechainsaw
Spawn Cyber Blaster givecybersmg
Spawn Cyber Buster givecyber
Spawn D4TH Blossom giveblossom
Spawn Electric Grenade giveelectric
Spawn Flamethrower giveflamethrower
Spawn Flash Bang giveflashbang
Spawn Grave Digger givedigger
Spawn Grenade givegrenade
Spawn K-8 Krukov givekrukov
Spawn KA-1 Kobra givekobra
Spawn M2 Grenade Launcher givelauncher
Spawn McManus 2015 givesniper
Spawn Mini Gun giveminigun
Spawn Molotov givemolotov
Spawn Nocturne givesword
Spawn RC Possesor givercgun
Spawn Reaper Drone givedrone
Spawn Riot Shield giveshield
Spawn RPG Launcher giverpg
Spawn S3X Hammer givehammer
Spawn SA-3 Airstrike giveairstrike
Spawn Satchel Charge givesatchel
Spawn Shock Hammer giverocket
Spawn Sonic Boom givesonic
Spawn Stun Gun givestungun
Spawn TEK Z-10 givetek
Spawn The Penetrator givedildo
Spawn Viper Laser Rifle giveslm8

Weather
Sunny weather clearskies
Cloudy weather overcast
Rainy weather lightrain
Very rainy weather heavyrain

World
Bloody Mess notrated
Heaven Bound (corpses rise into the air) fryhole
Vehicle Smash isquishyou
Drunk (drunk pedestrians) dui
Mascots (mascot pedestrians) mascot
Pimps and Hos (pimps and prostitutes pedestrians) hohoho
Zombies (zombie pedestrians) brains

Invincibility

Enter the "whatitmeanstome" code, and activate it approximately ten to twenty times. This will result in you reaching Level 50, and gaining about $5 million. Then, enter the character abilities screen to buy all the fall, fire, bullet, explosion, and vehicle strike damage reduction options until it reaches "Never take damage". This will basically give you complete invincibility from all damage. Note: You may still die due to a minor glitch if you are in a normal vehicle and run over by a tank or if you crash with an aircraft.
Bonus vehicles

Successfully complete the indicated task to unlock the corresponding vehicle:

Wraith: Successfully complete the hard level of the Trailblazing Activity in Decker's territory.
X2 Phantom motorcycle: Successfully complete Decker's version of the Trailblazing Activity (the other version that uses an ATV on fire is not required).

Bonus costumes

Successfully complete the indicated task to unlock the corresponding costume:

Cops/SWAT: Successfully complete all **** activities for Kinzie.
Deckers: Successfully complete the Assassination (Mission 37) from Kinzie that requires you to wear one.
Hos: Successfully complete all **** activities for Zimos.
Luchadores: Successfully complete Mission 43.
Mascots: Successfully complete all of Professor Genki's S.E.R.C. activities.
Morningstar: Successfully complete Mission 29.
National Guard: Successfully complete all Tank Mayhem activities.
Space Saints: Successfully complete Mission 47.
Strippers: Successfully complete all Escort activities for Zimos.
Wrestlers: Successfully complete Tiger Escort activities.