All campaigns
Note: This procedure involves editing a game file; create a backup copy of the file before proceeding. Use a text editor to edit the "game.dat" file in the game directory. Locate the line "Volume: -750, 0, -5??" and change it to "Volume: -750, 0, -581". Note: The "750" value may vary from game to game.

$10,000
Enter "Columbus" and give yourself a yellow flag for $10,000.

Free items
When you buy something and your income is red or low, save the game. Load it again and you will have your money back.

Cheat Codes (UK version)
While playing a game, hold [Ctrl] + [Shift] + [Alt] + W. If you entered the code correctly, a prompt will appear at the bottom left corner of the screen. Type 2061 and press [Enter] at the prompt. The, press A then press [Enter] to enable cheat mode. Enter one of the following codes to activate the corresponding cheat function:

Cheat Codes (German version)
While playing a game, hold [Alt] + [Ctrl] + [Shift] + W. If you entered the code correctly, a prompt will appear at the bottom left corner of the screen. Type 2061 and press [Enter] at the prompt. Then, press Q (QWERTY keyboard), A (AZERTY keyboard), or ß (German keyboard) to enable cheat mode. Place the pointer over a storehouse and press [Alt] + [Ctrl] + [Shift] + W to display the cheat prompt again. Type one of the following codes and press [Enter]. Then, press Q, A, or ß to place five units of the selected resource in the storehouse or keep that key held to fill that resource. Press [Shift] + K for cannons.