Go to the extras menu while in game and select cheat mod, here you enter whichever code you wish for the desired effect.

Code	Effect
100	If any leagues can be formed, it forms them.
101	All independent nations become pacifists and wont attack anyone.
1331	Choose how many orbs of madness you want.
172	100 of all independents units added.
1995	all locations unlocked.
19	All soldiers desert.
25	Adds 1000 people to the throne room.
29	1000 deserters added.
331	Time travel.
380	Choose how many lands you want.
388	All races have resurrecting troops.
390	Choose how much gold you want.
399	Enables Debug Mode.
404	Temporarily unlocks a special hidden exploration screen.
444	Makes all factions have 10x the land, 100x the gold and 10x the men.
445	Makes all factions have 100x the gold and 10x the men.
504	Colour setter test.
505	Colour name test.
616	Set demon horde to 2000 units.
666	666 of all units added.
69	69 lands added.
70	All factions love you.
71	All factions hate you.
747	All new human faces spawn with hats.
777	777 Million gold added.
7	7 million gold added.
801	All kingdoms have 1 land.
802	All kingdoms have 1 land and 1 single unit.
88	10000 soldiers added to army.
933	Spawns the void gate and void army.
99	1000 gold gained.