18 Wheeler: American Pro Trucker

Successfully complete each of the four parking levels to unlock an additional parking level. Successfully complete the bonus parking level to unlock a sixth parking level.

Finish the four parking levels to unlock a fifth parking level. If you finsih that as well, you will unlock a sixth parking level as well.

At the title screen, hold X and press Start. Dont release X until the mode selection screen appears
-or-
Beat the game with all four characters to unlock the Nippon Maru.

Extra parking level
Beat the first 4 levels to unlock truckstop.

New Truck And Trailer
Beat Very Easy Mode With All The Truck And There Should Be A Tight Truck With Lights and 2 Trailers.Cool!

Extra Parking Levels!!
When You Beat The Last Parking Level There Will Be 2 More Tracks,Truckstop And Factory 2!

Extra truck
Beat game once in arcade mode and a Chinese cabover truck will appear in the truck selection menu.

New Japanese Truck
Beat the arcade mode on normal difficulty with all 4 truckers and you will unlock "Nippon-Maru"!

New driver
Finish arcade mode with all 4 original drivers to unlock a new character and truck.

Get Horn Power Up
Beat Lizard Tail from New York to Key West

Get Muffler Power Up
Beat Lizard Tail from St. Petersburg to Dallas

Get Engine Power Up
Beat Lizard Tail from Dallas to Las Vegas

1000 Bonus Points
On the main menu select VERSUS, pick your truck and trailer and then press "a" Select Sea Side 1 as your game level, press "a",start of and when you get to and old ruddy looking building with a big garage crash it and it will say *Special* 1000 points

At the title screen hold X and press START. Continue to hold X to the Mode Select.