Weapon Set 1 ... LEFT, RIGHT, X, UP, DOWN, SQUARE, LEFT, RIGHT
Weapon Set 2 ... LEFT, RIGHT, SQUARE, UP, DOWN, TRIANGLE, LEFT, RIGHT
Weapon Set 3 ... LEFT, RIGHT, TRIANGLE, UP, DOWN, CIRCLE, LEFT, RIGHT
Get $250000 ... UP, DOWN, LEFT, RIGHT, X, X, L1, R1
Armor ... UP, DOWN, LEFT, RIGHT, SQUARE, SQUARE, L1, R1
Health ... UP, DOWN, LEFT, RIGHT, CIRCLE, CIRCLE, L1, R1
Raise Wanted Level ... UP, RIGHT, SQUARE, SQUARE, DOWN, LEFT, CIRCLE, CIRCLE
Never Wanted ... UP, RIGHT, TRIANGLE, TRIANGLE, DOWN, LEFT, X, X
Sunny Weather ... LEFT, DOWN, R1, L1, RIGHT, UP, LEFT, CIRCLE
Clear Weather ... LEFT, DOWN, R1, L1, RIGHT, UP, LEFT, X
Overcast Weather ... LEFT, DOWN, L1, R1, RIGHT, UP, LEFT, SQUARE
Rainy Weather ... LEFT, DOWN, L1, R1, RIGHT, UP, LEFT, TRIANGLE
Foggy Weather ... LEFT, DOWN, TRIANGLE, X, RIGHT, UP, LEFT, L1
Spawn Rhino ... UP, L1, DOWN, R1, LEFT, L1, RIGHT, R1
Faster Clock ... R1, L1, L1, DOWN, UP, X, DOWN, L1
Destroy All Cars ... L1, R1, R1, LEFT, RIGHT, SQUARE, DOWN, R1
Peds Riot ... R1, L1, L1, DOWN, LEFT, CIRCLE, DOWN, L1
Peds Attack You ... DOWN, TRIANGLE, UP, X, L1, R1, L1, R1
Peds Have Weapons ... UP, L1, DOWN, R1, LEFT, CIRCLE, RIGHT, TRIANGLE
Faster Gameplay ... LEFT, LEFT, R1, R1, UP, TRIANGLE, DOWN, X
Slower Gameplay ... LEFT, LEFT, CIRCLE, CIRCLE, DOWN, UP, TRIANGLE, X
Perfect Traction (Down is Car Hop) ... DOWN, LEFT, UP, L1, R1, TRIANGLE, CIRCLE, X
Commit Suicide ... RIGHT, RIGHT, CIRCLE, CIRCLE, L1, R1, DOWN, X
Aggressive Drivers ... UP, UP, RIGHT, LEFT, TRIANGLE, CIRCLE, CIRCLE, SQUARE
Black Traffic ... L1, R1, L1, R1, LEFT, CIRCLE, UP, X
Spawn Trashmaster ... DOWN, UP, RIGHT, TRIANGLE, L1, TRIANGLE, L1, TRIANGLE
Guys Follow You ... RIGHT, L1, DOWN, L1, CIRCLE, UP, L1, SQUARE
Upside Down ... SQUARE, SQUARE, SQUARE, L1, L1, R1, LEFT, RIGHT
Upside Down ... LEFT, LEFT, LEFT, R1, R1, L1, RIGHT, LEFT
Chrome Cars ... RIGHT, UP, LEFT, DOWN, TRIANGLE, TRIANGLE, L1, R1

topheridol
Cheat: Cars Avoid You
During the game, press UP, UP, RIGHT, LEFT, TRIANGLE, CIRCLE, CIRCLE, SQUARE to make cars avoid you.

femer
Unlockable: Extra Armor
Finish 15 Levels of Vigilante Sidemissions to unlock extra armor.

dezz
Unlockable: Bulletproof Business Vehicles
Acquire all 30 businesses to unlock bulletproof vehicles.

Unlockable: Discount at Ammu-Nation Gun
Complete the shooting range challenge near Phil's place to get a discount at the gun store.

Unlockable: Vehicles
Completing missions unlocks Vehicles:

Angel Bike - Beat "Taking the Fall"
Limo - Beat "Kill Phill"
Little Willie - Beat "From Zero to Hero"
Quadbike - Beat "When Funday Comes"

lozam11
Hint: Hunter Location
To find this helicopter, first you need to be done with all the story missions.

Get to the Escobar International area. Once you are there, go to the Escobar International Airport Building, where all the people get plane tickets and all that.

If you see the sign "Escobar International" on the building than you are okay!

You do not go inside the building. Instead, go to the left of the building and you will see an entrance for it looks like cars - go there! You will see an airplane that says "Plummet".

Get all the way to the end of the runway and there you will see a plane that you can be able to drive, if you see it, go East of the plane and keep on going. Soon you will see a "Green, military, strong, fast" helicopter. It is not bulletproof but it is tough enough to withstand some gunfire.

To shoot bullets press square and X (Together). To shoot rockets press circle.