True Crime: Streets of LA Cheats

Enter "WHUPASS" as a license plate. Note: Hold L + R when entering the letters and selecting "OK".

Alright, first go all the way up the the highway right above china town
and at the end of the highway it splits off into 2 roads, go to where
they split and look for a concrete wall that is floating. walk (or
drive) under it and take a right. stay against the fence until your out
in the open area. go straight until you are in front of this tyranny
that is labeled the Los Angeles river.dont go in it yet. stay just out
of it and drive all the way down to your right, parallel with the river
until it appears on your map, then you can drive it in and go all the
way down into the huge open areas.

Pause the game, select city map. press up, right, down, left, up, A. You should hear a chime.
You will now have all cars, stunts, guns, gunplay bonuses, grapples, attack combos.