Rename one of your park guests to the code.

These are all Roller Coaster Tycoon 3 Cheats and there may be more Easter Eggs in the game....Have fun.

Andrew Thomas - Decreases track friction. Only works after Update #1

Atari - All guests Laugh

Atomic Big Explosion - makes a huge explosion when a coaster crashes

ATITech - Everyone moves fast

Chris Sawyer - Guests Jumping for joy

D Lean - Opens the Flying Camera

David Braben - Unlimited launch and chain lift speeds ( Note: this only works after update #1)

Frontier - Rides and coasters never break down

Guido Fawkes - Gives access to the advanced Fireworks editor

James Hunt - You are given a buggy vehicle to ride in

John D Rockefeller - Gives you $10,000 Cash

John Wardley - Removes height restrictions while constructing new coasters

Jon Roach - Peeps ride all non-coaster rides

Jonny Watts - PeepCam

Sam Denney - Peeps ride all coasters

If you know anymore cheats post them at the forums. Thanks