18 Wheeler: American Pro Trucker Cheats

$999 by hitting bonuses:
Hit a bonus head first, then press L1 + R1 + X. You will get the maximum amount of $999. REMEMBER: This must be repeated each time.

Bonus parking levels:
Finish each of the four parking levels to unlock an additional parking level. After finishing the bonus parking level you will unlock a sixth parking level.
User Cheat by TankMcGraw

Nippon Maru:
Press and hold X and push Start in the title screen. Keep X held until the mode selection screen appears. Choose any mode to drive the Nippon Maru truck. Or finish arcade mode with all four trucks.

Lizard Tail:
After finishing the game with all five trucks (Asphalt Cowboy, Stream Line, Long Horn, Highway Cat, and Nippon Maru).

Bonus trailers:
After finishing arcade mode with all four characters to unlock two bonus trailers in score attack mode, versus mode, and arcade mode (if the Nippon Maru is selected).

Bonus parts:
Go to arcade mode and select any truck. Get to your destination ahead of your rival , then complete the bonus parking mini-game to win bonus parts. REMEMBER: This works on any destination.

Shifting:
For Highway Cat and Stream Line, shift up when at about 50 mph.

Slip stream:
When you are behind a truck, your size you will get a slip stream. This will allow you to get a small boost to get in front of the truck.