STARCRAFT: BROOD WAR
Blizzard Entertainment
If you complete level 9 of the Zerg campaign in less than 20 minutes you can unlock a secret level. To access the level again make sure you save the game on that stage, as it won't appear on the in-game stage list.
You can also give these cheats a whirl. During the game press Enter, type a code and hit Enter again to activate it.
THERE IS NO COW LEVEL	Mission skip
OPHELIA	Enable mission select cheats (type this before entering the next three cheats) 
TERRANx	Terran mission select, where x is the mission to select
ZERGx	Zerg mission select, where x is the mission to select
PROTOSSx	Protoss mission select, where x is the mission to select
BLACK SHEEP WALL	Show whole map
WAR AINT WHAT IT USED TO BE	Turn off fog of war 
MAN OVER GAME	You win
GAME OVER MAN	You lose
SOMETHING FOR NOTHING	Upgrade everything
MEDIEVAL MAN	Free upgrades for units
OPERATION CWAL	Fast building and instant upgrades
THE GATHERING	Limitless psionic ability
POWER OVERWHELMING	Invincible buildings and ships
FOOD FOR THOUGHT	Ignore supply limit when building units
NOGLUES	Opponent has no psionics
MODIFY THE PHASE VARIANCE	Build anything you want
SHOW ME THE MONEY	10,000 added to minerals and gas
WHATS MINE IS MINE	Increase minerals by 500
BREATHE DEEP	Increase gas by 500
STAYING ALIVE	Continue after mission has been completed
RADIO FREE ZERG	Zerg song (available only while playing as Zerg)