Drop the developer console (hit the TILDE key), then enter these codes:

Coinage - +1,000 Platinum
BlingBling - +10,000 Platinum
AlllsRevealed - All Campain Missions
SuperShopper - All Upgrades
Help - Displays Help
LayOnHands - Heal All Units
ManaKing - Inifinite Mana for Unit
StaminaKing - Inifinite Stamina for Unit
SirKnight - Knights Gain 1 Level
LevelLord - Lord Gains 1 Level
IAmNotTheOne - Lose Game
Pause - Pauses game
Omniscience - Removes Fog of War
Gamma # - Set Gamma to #
MaxKnight - Set Knights to High Level
KingMe - Set Lord to High Level
PowerBurst - Set Troops to High Level
ManaBoost - Set Units Mana to Max
StaminaBoost - Set Units Stamina to Max
MenuBar - Toggles Menu Bar
LetThemEatCake - Troops Gain 1 Level
IAmTheOne - Win Game