Note: This cheat requires that you have the Airport Tycoon 3 patch installed. Also be sure to back up your files before making any changes.By going into the game data following the same steps as listed for making everything free (go to My Computer, Program Files, Global Star Software, Airport Tycoon 3, data, db, right click on the "buildings" file, and select "open with" and then WordPad), you can change the date when each building will become available. The date for when each building will be made available is listed right after the word "destroy" in each line and includes the month and year for when it will be made available. For example, if you find a building with a date listed as "3/1980", you can change it to "1/1970" to make it available on January 1, 1970 (the beginning of the game). Then save your changes.