Cheat mode:

Start game as usual. During gameplay press tilde to go to 
console, then enter the following cheats followed by ENTER:

Code             Result
----------------------------------------
INeedCash      - Get 100.000.000 extra money.
MassDrop       - Get Huge Airport.
DoEarthquake   - Invoke Eartquake.
DoTornado      - Invoke Tornado.
SetBudget xxx  - Get xxx extra money.
SetCash xxx    - get xxx extra money.
HideGame       - Hide Game.
ShowGame      -  Unhide Game.