Test Drive Off-Road 3 cheats, and Codes for PC.
Enter ZAKARY X as a name to unlock all trucks and cheat options.
Cheat Mode (alternate)
Note: This procedure involves editing a game file; create a backup copy of the file before proceeding.
Enter the "vehicles" sub-directory that is inside the game directory. Use a utility such as WinZip or PKUnzip to extract the "physics.txt" file from any of the .zip files. Use a text editor to edit the "physics.txt" file and change the "//idealMaxSpeed" entry to "200". Save the file and add it back to the original .zip file. The top speed bar will be full for the vehicle when you play the game.