To switch on cheat mode, type in

HUMANZEE

whilst in game. A graphic should appear to show it worked. You can then use the following cheats:

[Ctrl]+[S]      Set off explosion / airstirke
[Ctrl]+[C]      Add $100,000
[Ctrl]+[A]      Army of Darkness (one of every henchman and minion)
[Ctrl]+[O]      Give all items
[Ctrl]+[M/N]    Turn on/off Global Chaos
[Ctrl]+[T]      Gives all traps