Cheat mode:
Press [Enter] during gameplay:

Result - Code:
Spawn goblins - goblin rush
Spawn all undead - night of the living dead

Gold and all powers:
While in the game, press enter and type in the cheat “fill this bag” without the quotations, of course. To get all the powers type “i have the power” without the quotations.

Push Enter when playing to enter in the following codes:

Acquire All Buildings:
Code: build anything

Acquire All Powers:
Code: i have the power

Extra 10,000 in gold:
Code: fill his bag

Acquire All Spells:
Code: give me power