Press Enter during gameplay then input the following codes and press Enter again to unlock the corresponding effect.

Turn Gazelles, Lions, Elephants and Alligators into Animal Kings:
Grantlinkspence

Win the Game:
HOME RUN

Lose the Game:
HARI KARI

Resign:
RESIGN

1000 Food Bonus:
PEPPERONI PIZZA

1000 Gold Bonus:
COINAGE

1000 Stone Bonus:
QUARRY

1000 Wood Bonus:
WOODSTOCK

Accelerates your Chariot Archers:
UPSIDFLINTMOBILE

All Enemy Units Die:
DIEDIEDIE

Kill Player X:
KILLX

Priests are Faster and Stronger:
HOYOHOYO

Removes the Fog of War:
NO FOG

Reveals the Map:
REVEAL MAP

Buildings and Units are Created Instantly:
STEROIDS

Black Sports Car with a Rocket Launcher:
BIGDADDY

Create a Man in a White Suit with a Quick-firing Laser Gun:
PHOTON MAN

Creates a Man in a White Suit with a slow-firing Nuke Gun:
E=MC2 TROOPER

Gives you Control over Nature (but lose control over your own civilization):
GAIA

St. Francis Unit that resembles Priest but can summon lightning when close enough to opponent:
CONVERT THIS!

Summons a Baby on a Tricycle with a Musket:
POW

Turns Heavy Catapults into Big Berthas:
BIG BERTHA

Turns Horse Archers into Black Riders:
BLACK RIDER

White Sports Car with a Roket Launcer:
BIG MOMMA

Your Ballistas and Helepolis have a 99+1 Range:
ICBM

Your Catapults and Stone Throwers Fire Villagers, Cows, etc:
JACK BE NIMBLE

Upgrade your Catapult Tiremes/Juggernauts into Flying Dutchmen:
FLYING DUTCHMAN

Turns a Bowman into a Composite Bowman which turns into a tree when not moving:
DARK RAIN

Summons a Robot:
STORMBILLY

Transforms villagers to Medusas:
MEDUSA

Turns ALL Birds into Dragons:
KING ARTHUR