Warcraft has a Master Code that is required to enable the cheat codes listed below, and it must be entered before any of the codes will work. Please note that in a Two-Player game, these codes will affect both sides.
Master Code: Corwin of Amber

Warcraft Cheats
LEVEL NAME - Takes player to the requested level (i.e. ORC12) This cheat works only in Campaign Mode
YOURS TRULY - Takes player to the victory sequence This cheat works only in Campaign Mode
CRUSHING DEFEAT - Takes player to the loss sequence This cheat works only in Campaign Mode
IDES OF MARCH - Takes player to the finale sequence for the campaign the player is currently in
POT OF GOLD - Adds 10,000 gold and 5,000 lumber to your reserves
EYE OF NEWT - Upgrades your magic users with all spells
IRON FORGE - Upgrades all technologies immediately
SALLY SHEARS - Displays the entire map area
HURRY UP GUYS - All buildings, units and upgrades are built/trained at an accelerated rate
THERE CAN BE ONLY ONE - All of your units are invulnerable except by a direct catapult hit, and will inflict 255 points of damage per hit.