Master code:

In the map prompt, push Up, Right, Down, Left, Up, A. You will hear a sound if you have entered the code correctly.

Every bonus will be unlocked. But the code also disables upgrade missions.

Every upgrade:
In the map prompt, push Up, Left, Down, Left, Up, A. You will hear a sound if you have entered the code correctly.

All unarmed upgrades:
In the map prompt, push Up, Down, Up, Down, A. You will hear a sound if you have entered the code correctly. Enabling this code will prevent the training missions from being accessible.

All driving upgrades:
In the map prompt, push Left, Right, Left, Right, A. You will hear a sound if you have entered the code correctly.Enabling this code will prevent the training missions from being accessible.

All weapon upgrades:
In the map prompt, push Right, Left, Right, Left, A. You will hear a sound if you have entered the code correctly.

Boost:
Hold Up and push A(3). You will hear a sound if you have entered the code correctly.


Extra car mass:
While in a car, display the map screen. In the map prompt, push Down(3), A. You will hear a sound if you have entered the code correctly.

Show Nick's coordinates:
In the map prompt, push A, B, X, Y. You will hear a sound if you have entered the code correctly.

Impound garage cars unlocked:
In the map prompt, push Up, Right, Down, Left, Up, A. You will hear a sound if you have entered the code correctly.

Unlock a bum:
Submit the license plate name B00Z. Hold L + R when Submit the license plate nameing the letters and selecting "OK".

Unlock a SWAT member:
Submit the license plate name 5WAT. Hold L + R when entering the letters and selecting "OK".

Unlock a commando:
Submit the license plate name M1K3. Hold L + R when entering the letters and selecting "OK".

Unlock high ranking police officer:
Submit the license plate name FATT. Hold L + R when entering the letters and selecting "OK".

Unlock Officer Johnson:
Submit the license plate name FUZZ. Hold L + R when entering the letters and selecting "OK".

Unlock your female boss:
Submit the license plate name B1G1. Hold L + R when entering the letters and selecting "OK".

Unlock your partner:
Submit the license plate name ROSA. Hold L + R when entering the letters and selecting "OK".

Unlock your partner in lingerie:
Submit the license plate name HURT_M3. Hold L + R when entering the letters and selecting "OK".

Unlock a gangster:
Submit the license plate name TFAN. Hold L + R when entering the letters and selecting "OK".

Unlock an Asian worker:
Submit the license plate name HARA. Hold L + R when entering the letters and selecting "OK".

Unlock Asian high-roller:
Submit the license plate name MRFU. Hold L + R when entering the letters and selecting "OK".

Unlock Asian butcher:
Submit the license plate name PHAM. Hold L + R when entering the letters and selecting "OK".

Unlock tattoo lady:
Submit the license plate name TATS. Hold L + R when entering the letters and selecting "OK".

Unlock a street punk:
Submit the license plate name MNKY. Hold L + R when entering the letters and selecting "OK".

Unlock punk girl:
Submit the license plate name B00B. Hold L + R when entering the letters and selecting "OK".

Unlock pimp:
Submit the license plate name P1MP. Hold L + R when entering the letters and selecting "OK".

Unlock champion boxer:
Submit the license plate name BRUZ. Hold L + R when entering the letters and selecting "OK".

Unlock big biker:
Submit the license plate name HAWG. Hold L + R when entering the letters and selecting "OK".

Unlock blindfolded smoking donkey:
Submit the license plate name JASS. Hold L + R when entering the letters and selecting "OK".

Unlock corpse:
Submit the license plate name J1MM. Hold L + R when entering the letters and selecting "OK".

Unlock Snoop Dogg:
While playing the game, collect 30 bones. You can find them marked in yellow on the map.

Bonus FMV sequence:
Finish the game with all three endings.