Instructions
Launch "Airport Tycoon 3."
Start or continue a game.
Press the "Tilde" key. This key is normally located on the upper left side of the keyboard, and is marked with a "~" symbol. Pressing this key opens the developer console, which you need to enter cheats.
Type a cheat into the developer console and press "Enter." Close the developer console by pressing the "Tilde" key again.