Smuggler's Run: War Zones

No gravity:
Pause game play, then press X, Z, X, Z, Up(3). A sound will confirm correct code entry. Repeat this code to disable its effect. Vehicles in traffic will float when hit.

Low gravity:
Pause game play, then press Z, R, Z, R, Right(3). A sound will confirm correct code entry. Repeat this code to disable its effect.

Unlimited countermeasures:
Pause game play and press Y(3), X(2), Z(2). A sound will confirm correct code entry. Repeat this code to disable its effect.

Transparent car:
Pause game play, then press Left, Right, Left, Right, Z(2), R. A sound will confirm correct code entry. Repeat this code to disable its effect.

Map:
Lightly press L during game play and a faint map will appear.
Steve Logsdon.

ATV Boost:
Successfully complete Smuggler's Mission 14.

ATV Monster:
Successfully complete Smuggler's Mission 10.

Baja Truck Bombs:
Successfully complete Smuggler's Mission 7.

Baja Truck:
Successfully complete Smuggler's Mission 4.

D-5 Hondo:
Successfully complete Smuggler's Mission 11.

Du Monde Oil Slick:
Successfully complete Smuggler's Mission 5.

Dual Career Countermeasures:
Successfully complete Smuggler's Mission 36.

Grenadier Bombs:
Successfully complete Smuggler's Mission 25.

Grenadier:
Successfully complete Smuggler's Mission 24.

Hondo Oil Slick:
Successfully complete Smuggler's Mission 15.

Hoverbike:
Achieve a "Great" rank on all Smuggler's missions.

Kavostov Halftrack:
Successfully complete Smuggler's Mission 27.

Kavostov Smoke Screen:
Successfully complete Smuggler's Mission 29.

North America:
In joyride mode, get the token in Russia (on the roof of HQ), then the token in Vietnam (use the V-Boost move to get to the volcano), and the token in Russian Winter (on a small "house" near where you start).
Information in this section was contributed by muglich.

Russian Winter:
Successfully complete Smuggler's Mission 22.

Sahara Smoke Screen:
Successfully complete Smuggler's Mission 20.

Sahara Special:
Successfully complete Smuggler's Mission 18.

Special Du Monde:
Successfully complete Smuggler's Training 3.

Super Buggy Boost:
Successfully complete Smuggler's Mission 2.

Vietnam:
Successfully complete Smuggler's Mission 9.

SR News FMV sequence:
Finish in first place in all 25 checkpoint races. The bonus SR News FMV sequence will be unlocked at the "Movie Theater" screen.
xphile.

Hint: Eastern Europe: Secret token:
You can find a secret token on top of the arch in the town. It is easiest to get it with the Baja truck using the vertical boost.
Bjoker88.

There is a token in the industrial city in Joyridin' mode . First, go up one ramp to get on top of a building. From that building, ramp up the roof to the token.
HamHamInTheHouse.

Hint: North America: Secret tokens:
You can find a secret token on top of the second waterfall. You have to drive around to the top and jump off the edge.
Bjoker88 and Jebdiahbob.

You can find a secret token on the tall mountain directly across from the first waterfall.
Marty Hitchcock.

There is a secret token under one of the bridges next to the second waterfall.
Marty Hitchcock.

There is another token above the nearest waterfall to where you start in Joyridin' mode. This waterfall is near the central village.
HamHamInTheHouse.

From where you start, go to the river. Follow it until you see a white dot on your map. That is a waterfall. Go on top of the waterfall. Drive as fast as possible off the waterfall towards the right side of it. You will eventually find the token.
Geoff DeLeary.

Hint: Russia: Secret tokens:
You can find a secret token (a small spinning tile with the Rockstar Games logo on one side and the Angel Software logo on the other) at the corner of the level, on a very small island at the top in joyridin' mode.
gameplayer.

You can find a secret token on top of the warehouse, which is in the top of the map towards the middle in joyridin' mode. Use the Baja truck with vertical boost and bombs to reach the roof.
Bjoker88 and Jebdiahbob.

You can find a secret token by the river. There is a little dirt jump leading directly to it. It is easy to do with the Baja truck or the ATV Monster.
Bjoker88.

There is a secret token on an island on the far side of the big lake in Joyridin' mode.
HamHamInTheHouse.

Hint: Russian Winter token:
You can find a secret token at the burned village in the far corner in joyridin' mode.
gameplayer.

Hint: Vietnam: Secret token:
You can find a secret token at the side of the volcano that you can get stuck at if you drive in. It is on the side in joyridin' mode.
gameplayer.

Hint: Vietnam: Explore volcano:
Choose the Baja truck the Vietnam level in two player joyridin' mode. When the level starts, enable the "Unlimited countermeasures" code. Go to where the volcano is located and get in the water. Keep pressing X (boost jump) in the volcano's direction to reach it.
RKB22NOW.

Hint: Driving in water:
When in water, hold the gas then use vertical boost. When you are in very deep water, such as when getting the token on the side of the volcano in Vietnam, make sure you try getting the token with a vehicle that has vertical boost.
Atvrider16.

Glitch: Camera always looks behind:
While in two player Joyriding mode, press Start. Then, hold the C-stick in any direction and press Start to resume. The camera will be facing the front of the vehicle and looking behind it. To disable this, press Start to pause game play. Then, press Start again to resume without pressing the C-stick.
Daniel Johnson.