Push the "Enter Key" & Type in Cheat

Age of Empires - Final Version Game Cheats

MEDUSA - villagers become medusa. When villager is killed, he becomes a black rider. and if killed again becomes a heavy catapult.
DIEDIEDIE - you all die
RESIGN - you resign
REVEAL MAP - reveals all the map
PEPPERONI PIZZA - gives yourself 1000 food
COINAGE - gives yourself 1000 gold
WOODSTOCK - gives yourself 1000 wood
QUARRY - gives yourself 1000 stone
NO FOG - remove the fog-of-war
HARI KARI - suicide (a more spectacular way to resign)
PHOTON MAN - get a 'Nuke Trooper' (guy /W A laser gun)
GAIA - control the animals (You loose control of your humans)
FLYING DUTCHMAN - juggernaughts turn into the Flying Dutchman
STEROIDS - instant build
HOME RUN - win the scenario
KILLX - where 'X' is the players position (1,2,3,4,5,6,7,8)
BIGDADDY - get a cool car /W a rocket launcher
BIG BERTHA - heavy catapults have greater range and damage
ICBM - ballistias get 100 range points
HOYOHOYO - priest speed up alot, and get 600 hit points
JACK BE NIMBLE - catapults fire peasants who do somersaults as they fly through the air.
E=MC2 TROOPER - get a futuristic trooper. who fires nuclear missles which explode when they hit.
UPSIDFLINTMOBILE - Chariot Archers Speed Up

Make Priests Have HP 1200 and Super Speed

Type HOYOHOYO before researching at the temple. One technology doubles hit points from 600 to 1200.

Fast Resources
Use the following trick to rapidly enter the cheat codes and get resources quickly. For wood, press [Enter], type woodstock, highlight the word, then press [Ctrl] + C to copy it. Press [Enter] to activate the cheat. Press [Enter] again, then press [Ctrl] + V to paste the word on the screen for activation. Repeat to get resources quickly. This may be used with the quarry, coinage, pepperoni pizza, and photon man codes.

Age of Empires DEMO Game Cheats
Net Demo
None - If you find one - let us know.
CGW Demo
Victory - Immediate victory. (Submitted by LjgUltima)

Age of Empires Beta Game Cheats
STONE gives you 1000 stone
WOOD gives you 1000 wood
FOOD gives you 1000 food
GOLD gives you 1000 gold
PLAYER[1-8] switch perspective to player #[1-8] (be careful not to do this to a defeated player ;)
RESIGN throw in the towel...
VICTORY you win
SUICIDE like RESIGN, except with more fireworks
KILL[1-8] destroys player #[1-8]
DIEDIEDIE kills all other players
GIVEMEFISSIONMAN you get the cool guy with the gun
GIVEMEPHOTONMAN like above, except much less powerful gun