Flatten Terrain
During the game type "flatterrain" to turn a mountain into a plain. Flatter terrain will help you build structures easier and can take the advantage away from an enemy that holds higher ground than you.
Switch Sides
If you don't like your side of the map and want to switch with your enemy, type "setplayer" to turn the tables on your foe.
Remove Fog
The game includes fog elements that you can remove by typing "togglefog." This will help you view enemies better (and conversely help them see you).
Tree Elimination
Get rid of those pesky trees that are in the way of your construction efforts by typing "removedecors." This also can revel enemies hiding in the woods.
Remove Houses
Type "togglevis" to remove houses if you want to demolish some structures and restart your empire building efforts.