All cities in arcade mode:
     Enter roadtrip at the cheat menu.

No damage:
     Enter ontheroad at the cheat menu.

Faster pedestrians:
     Enter urbansprawl at the cheat menu.

Increase car mass in arcade mode:
     Enter hyperagro at the cheat menu.

Argo special move:
     Enter dfens at the cheat menu.

Zone special move:
     Enter allin at the cheat menu.

Roar special move:
     Enter Rjnr at the cheat menu.

Chrome head:
     Enter haveyouseenthisboy at the cheat menu.

Flaming head:
     Enter trythisathome at the cheat menu.

Yellow smile head:
     Enter getheadj at the cheat menu.

Pumpkin head:
     Enter getheadk at the cheat menu.

Bunny head:
     Enter getheadl at the cheat menu.

Snowman head:
     Enter getheadm at the cheat menu.

Add $1 to Career Money Total:
     Enter kubmir at the cheat menu.

Subtract $1 from Career Money Total:
     Enter rimbuk at the cheat menu.

Find Rockstar Logos:

     Atlanta:  When  you get out of the garage immediately turn to the
right. You will see a glass. Crash through to find the logo.

     Atlanta: Drive to the bottom of the map. Look for a building with
a  large  globe.  There  is  a logo that reads "Nitro Cola". A logo is
located directly under it.

     Atlanta: Drive to the graveyard in the south of the map (near the
highway). There is a logo at the east part of the building.

     Atlanta:  Follow  the  highway  until you reach a place with some
construction  work.  Drive  off  the  highway  (to  your right side if
driving  north),  and  look  for  a  tank station. Follow the building
around  and  you  will  see  a ramp/road going up. Get some speed, fly
over,  and  you will land on the roof of the building. The logo should
be directly in front of you.

     Atlanta:  Follow  the  highway  until  you  see a building with a
yellow  sign on top that reads "DJ Smalls". Across the road is a small
parking  area  where you can see a sign on another building that reads
"Spike".  To  the  left  of  that building is a basketball court and a
logo.

     Atlanta:  Follow the building where your garage is located. Drive
through the skeleton's mouth and you will find a logo.

     San  Diego: Find the aircraft carrier and locate the ramp to jump
onto the flight deck. Here you'll find a logo.

     San  Diego:  There  is a logo behind the baseball stadium. Follow
the  highway  to  the  back  of the stadium. You will then see a small
ramp. Drive up to find the logo.

     San Diego: There is a logo at the top deck of the hangar ship.

     San  Diego: Drive to the beach at the top left of the map. Follow
the beach until you see a small tunnel. There you'll find the logo.

     San  Diego:  At the lower left of the map (near the hanger ship),
follow  the  coastline.  There  is  no road close by. Follow the large
building, and you will find a small road that leads up to a roof. Turn
left and you will see the logo.

     San  Diego: Almost at the lower right corner at the map, there is
a  large  parking  garage.  When  you  are on the street, drive to the
bottom  left corner of the building. Drive up the ramp, turn left, and
drive through the window to find another logo.

     San  Diego:  To  the  far  left of the map at the roller coaster,
drive up the ramp that is located to the north. Ride to find the logo.

Unlock Atlanta and Detroit Police Cars:
     Successfully complete the game.

Unlock Skully Bike:
     Win all of the "Chopper of America Bike Club" races.

Unlock Nissan Skyline:
     Win all tuner racer tournaments.

Unlock Diablo Rigid:
     Defeat Vanesssa three times in career mode.

Unlock Chrysler 300C "DUB EDITION":
     Win the Balboa Park tournament in San Diego.