Cheat mode:
Enter ZARKON as a name and 8AAACAA9999 or 8AKLR2EC71L as a password. Start game play with the maximum amount of money and the ability to build all rides, buildings, and attractions.

Australia and extra money:
Enter ZARKON as a name and PAN6CAA85T9 as a password.

$33 million:
Enter DST as a name and 5AKCQSEBDS4 as a password.

$900 million:
Enter ZARKON as a name and 7AR9R9968O4 as a password to start the game with over $900 million, and all the sites gold except for South Africa.