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Rollercoaster Tycoon Only
Picture Guest
Enter "Chris Sawyer" As a guest name to have them walk around and take pictures of your park.
Painting Guest
Enter "Simon Foster" As a guest name to have them walk around and paint pictures of your park.
Happy Guest
Enter "Melamie Warn" as a guest name to have them be very happy.
Waving Guest
Enter "Katie Brayshaw as a guest name to have them walk around and wave to everyone.
Double Payment For Rides Guest
Enter "John Mace" as a guest name.
"WoW" Thinking Guest
Enter "John Wardley" As a Guest name.
Faster Go Carts
Enter "Damon Hill" As a Guest name.
Mega Park
Successfully complete all levels to unlock the Mega Park.
Extra Money
Obtain a lot of guests and money before March of the second year. Then, completely shut down your park for one entire year. Than a man in a black suit will apear and give you $1,000,000.

Allthought these codes don't do worth a damn or at least most of them it is still fun to wtch them do it.

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