In order for these codes to work you must first access 
the chat window by hitting enter, then type in the cheat 
and hit enter again for them to work.

Diediedie- All other players die 

Resign- You resign

Reveal map- Reveals all the map

Pepperoni pizza- Give yourself 1000 food

Coinage- Give yourself 1000 gold

Woodstock- Give yourself 1000 wood

Quarry- Give yourself 1000 stone

No fog- Fog of War off

Hari Kari - suicide

Medusa- If your villager is being killed by the enemy, he 
will turn into a horse archer, and if that archer is being killed, he 
will turn into a catapult.

Photon Man-Get guy with laser gun

Gaia- Control over animals

FLYING DUTCHMAN- Turn the juggernaughts to flying dutchmen

STEROIDS- You get all units and upgrades in an instant

Home run- You win the scenario

Killx- (x = player's position); e. g. Kill2
(defeats the second player on the list)

Bigdaddy- Get a very powerful car (attack: 300, HP:
500, range: 15)

Big Bertha- Heavy catapults have greater range and
damage

ICBM- Ballistias get 100 range points

Hoyohoyo- Priests get lots of speed and 600 hit points 
also I discovered these ones the other day:

E=mc2 trooper- The nuke missile guy (attack: 300, range: 88)

Jack be nimble- Do this when you have a catapult 
selected, it will then shoot cows if pointing north, 
and villagers doing cartwheels, and looking like 
super man in other direction.

Dark Rain- turns composite bowman into stelf archer(walks on deep sea,
morfs into a tree when not moving

Zeus- Makes troops invisible

Black Rider- Transforms Horse Archer into a Black Rider.