Jumbo Jet
Go to the airport in Las Venturas. Next look around for the large air hanger in 1 of the corners of the airport. Stand in front of the garage door of the hanger. It will open and there before your very eyes will be a huge airline passenger jet for you to fly around.
Submitted By: Rasta Rocket
Unlimited Ammo
Unlimited ammo - Complete the game 100% (get 100% on the stat Progress Made)
Submitted By: Trippel-X!
Secret Cars
Here is a cheat to get some secret cars, boats and stuff
BF injection: Get first place at the dirt ring race at las venturas stadium
Bloodring Banger: Get your total time up to 1 minute in the Bloodring
Bullet: Get all silver awards in driving school
Dune: Beat the score of 25 at the Dirt Ring
FCR-900: Get all silver awards in bike school
Freeway: Get all bronze awards in bike school
HotKnife: Get all gold awards in driving school
Hotring Racer: Get first place in 8 - Track
Hunter: Get all gold awards in pilot school to spawn one at Verdant Meadows Airstrip
Hydra: Beat the mission, "Vertical Bird" and it will spawn at your airstrip
Jet Pack: Complete the airstrip asset near Las Venturas
JetMax: Get all gold awards in boat school
Marquis: Get all bronze awards in boat school
Monster Car: Win it by beating 8-track
NRG-500: Get all gold awards at Bike School
Rustler: Get all bronze awards in pilot school
Squallo: Get all silver awards in boat school
Stunt Plane: Get all silver awards in pilot school
Super GT: Get all bronze awards in driving school
Submitted By: john
Outfits
These are all the Unlockable Outfits in the game:
Medic Uniform - Date Katie to %100
Pimp Suit - Date Denise to %100
Overall's Outfit - Date Helena to %100
Racing Outfit - Date Michelle to %100
Police Uniform - Date Barbara to %100
Valet Uniform - Complete the mission "555-WE-TIP"
Gimp Suit - Complete the mission "The Key to her Heart"
Croupier Uniform - Complete the mission "Breaking the bank at Caligula's"
Girlfriends Cars
These cars are obtained through getting the girfriends to %50:
Green Hustler - Date Denise to %50
Bandito - Date Helena (Her car doesn't have any doors)
White Romero - Date Katie to %50
Monster Truck - Date Michelle to %50
Police Ranger - Date Barbara to %50
Pink Club - Date Millie to %50
Girlfriend Perks
Free Pay-and-Spray
Date Michelle and you can use her Garage as a Pay-and-Spray
Keep weapons after being Wasted
Date Katie
Keep weapons after being Busted
Date Barbara
Pistol, Chainsaw, Molotov Cocktails, and Flame Thrower
Date Helena (you can find the weapons in a big shed by her house)
Dual Weildable Weapons
Get these weapons to Hitman to Dual Weild them
Dual Pistol's - Reach the Gun Rank "Hitman"
Dual Sawed-off Shotgun's - Reach the Gun Rank "Hitman"
Dual Tec-9's - Reach the Gun Rank "Hitman"
Dual Micro-SMG's - Reach the Gun Rank "Hitman"
"Hidden Package" Rewards
Collect all the "hidden packages" in their respective areas to get these weapons...
Tec-9, AK-47, Sawn-off Shotgun, and Molotov Cocktails at CJ's house in Ganton - Spray all 100 Graffiti Tags in Los Santos
Sniper Rifle, Grenades, Shotgun, and Micro-SMG at CJ's Garage in San Fierro - Snap all 50 Snapshots in San Fierro
MP5, Satchel Charge, M4, and Combat Shotgun at The Four Dragons Casino in Las Venturas - Collect all 50 Horseshoes in Las Venturas
Assets
Complete the assets missions/objectives to get money made at that location
Airstrip Asset - Complete the Missions for the Airstrip
Burger Shot Asset - Complete all 4 Deliveries in Las Venturas
Hippy Shopper Asset - Complete all 4 Deliveries in San Fierro
Roboi's Food Mart Asset - Complete all 4 Deliveries in Los Santos
The Johnson House - Take Over Territories in Los Santos
Vank Hoff Hotel Valet Parking Asset - Complete all 5 Levels of Valet Parking in San Fierro
Wang Cars Asset - Complete the missions for this asset, plus the cars you steal will spawn inside the showroom
Zero's RC Shop Asset - Complete all of the RC Shop missions
Vehicle Side-Mission Unlockables
CJ becomes Fireproof - Complete all 12 Levels of the Firetruck Missions
Armor get raised to Maximum - Complete all 12 Levels of the Vigilante Missions
Health get raised to Maximum - Complete all 12 Levels of the Paramedic Missions
$50,000 & Free Train Rides - Complete all 2 Levels of the Freight Train Missions
Nirto on all Taxis/Cabbies and Taxi's and Cabbies can Hop - Succesfully Transport 50 People(Complete 50 Fares)
Entertaining prositutes earns you money - Complete level 10 of the pimping missions