Civilisation 2

Change Attitude:
To alter your council's attitude and time period, enable Cheat Mode, then press[Ctrl]+[Shift]+[T].

Edit Unit :
Hold [Ctrl]+[Shift]+[U]. You can now change all atributes except type of unit.

Edit the Throne Room:
To change your throne room, turn Cheat Mode on then press [Q] and click on the spot you wish to change.

Invincibility :
Type "god" during gameplay to become invincible.

Use Enemy City:
Infiltrate your enemy's cities.
Press [V] and move diagonally into an enemy city and press ENTER.
You can now change the city's productivity and disband unit.
(Information from Cheat Machine)