Smuggler's Run 2: Hostile Territory:

Antigravity for Ambient Vehicles:
R1, R2, R1, R2, Up, Up, Up. 
Double the Frame Rate:
R3, L3, L3, R3, Left, Circle, Left, Circle. 
Fast Motion:
R1, L1, L2, R2, Right, Right, Right. 
Glass Car:
Left, Up, Right, Down, Right, Up, Left, L2.
Increase Speed:
R1, L1, L2, R2, Right, Right, Right. 
Invisibility:
R1, L1, L1, R2, L1, L1, L2. 
Low Gravity:
L1, R1, R1, L2, R2, R2. 
Slow Motion:
R2, L2, L1, R1, Left, Left, Left. 
Unlimited Countermeasures:
R3, R3, R3, R1, R1, R2, R2. 
Invincibility:
Hold L1 and press Square, Square, Square, Square, R1, X, X, Triangle, Triangle, Square. 

Unlockable Items:
Beat the mission shown to unlock the bonus item. 

MISSION 2 - Super Buggy Boost
TRAINING 3 - D-5 Hondo
MISSION 4 - Baja Truck
MISSION 7 - Baja Truck Bombs
MISSION 8 - Hondo Oil Slick
MISSION 9 - Vietnam
MISSION 10 - ATV Monster
MISSION 13 - Sahara Special
MISSION 14 - ATV Boost
MISSION 15 - Hondo Oil Slick
MISSION 17 - Sahara Smoke Screen
MISSION 18 - Special Du Monde
MISSION 21 - Du Monde Oil Slick
MISSION 22 - Russian Winter
MISSION 24 - Grenadier
MISSION 25 - Grenadier Bombs
MISSION 27 - Kavostov Halftrack
MISSION 29 - Kavostov Smoke Screen