While playing the game press Ctrl + K to start the map editor. Now enter one of the following codes.

Code effect Code
Change year [Shift] + [F5]
Create unit [Shift] + [F1]
Discovery technology [Shift] + [F2]
Edit energy credits [Shift] + [F4]
Edit Faction diplomacy [Shift] + [F9]
Full map Y
Kill opponent [Shift] + [F6]
Switch sides and reset view [Shift] + [F3]
View FMV sequences [Shift] + [F8]
View replay [Shift] + [F7]