Secret car in Chicago:
if you look at the map to the left, you will see a
small line(which is a small road).go there and keep
going until you reach a big place like a stadium.
Face the gate of the stadium and go to youre left.
Go slowly until you see a brown pole that has a square
on top of it.
Get out of youre car and press triangle on the brown
pole and it will say youve unlocked a secret place.
Go inside the hall until you find a car.(it is a small white car).
The Invincibility cheat is in Las Vegas. To get it, go
to the corner of Tropicana and the Mid Strip. If you
have know idea what I just wrote about, go to the MGM
Grand Casino.( The one with the big lion in front )
When you get there, drive north and look to your right.
Down the block should be a long black and blue building
with lights across the top and middle. Also you should
see a big sign that says bingo, go to the left of that
sign and there will be a switch between two black doors.
The Immunity cheat is in Rio. To get it turn around and
keep driving striaght and on your 4th block take a right.
Follow this road and then on your 4th block take a left,
and to your right should be a big building with a smaller
building with barb wire around the top near it. Go to the
smaller building with the barb wire and there should be a
door. Go up to the door and press triangle and the door will
open. Go in and to your right will be a garage door. Open the
garage door and go out. You should be facing the big building,
now go to the door on the far left and press triangle and
you'll unlock the Immunity cheat.