To activate the cheat mode (an "Extras" menu), type
 CTRL A O D B A M F
 in sequence at end turn. The menu contains the following cheats:
 
 ScaleIt : Increases your production.
 ArmyInfo : See information about the other races.
 MoneyAndPower : self-explanatory.
 AllSeeingEye : Reveal the whole map!
 GetRichQuick : self-explanatory.
 GetSmartQuick : self-explanatory.
 MissileCrisis : Creates the production of nuclear missiles.
 SettlersHo! : Creates settlers.
 Nukestorms : Causes Global Warming.
 Automode : The computer moves for you.
 Armaggedon : Nukes the whole world!
 
 (Submitted by Rob Loach)