Rename any of your park guests to one of the following names to activate cheat function:

Chris Sawyer - Takes pictures of rides.
Simon Foster - Paints pictures of rides.
Melanie Warn - Icreases guests happiness.
Katie Brayshaw - Waving guests.
John Wardley - Constantly thinks wow!
John Mace - Pays double prices on rides.
Damon Hill - Guest drives go-karts twice as fast as the other patrons.

All Rides, Scenarios, and Unlimited Money
To get everything, hold Shift at the main menu and type "rct2". Then push Enter. Note: This cheat does not work on all versions of the game.

Goto Finances by pressing F, then press enter + M for $5,000. This can be done only once a month for an unlimited amount of cash.

Increase Park Rating
Though it is questionable ethically, it makes "business" sense... Maintain high park ratings by drowning all unhappy guests! (Click on a mad guest and use the pincer icon to place him in the water).

Remove Weeds Without Mowing
To remove weeds without mowing the landscape, click on a construction button (like the leveling land button). Then click on a weed and it will disappear.

Million Dollar Cheat
If you can get a lot of guests and lots of money before March of Year Two, then shut down your park completely (rides, stands, everything) for an entire year. A man in a blue suit should appear and give you a million dollars!