During the game type " IAMACHEATER " to enable the cheat mode. Then use any of the following cheat keys:

Code - Result:

[CTRL]+[Left-SHIFT]+0 - Instant Disaster
[CTRL]+[Left-ALT]+C - Increase Money
[CTRL]+[Left-SHIFT]+C - Decrease Money
[Ctrl] + SHIFT + numeric pad - - Decrease Gamma
[Ctrl] + SHIFT + numkeric pad + - Increase Gamma