Press TAB during game play, then activate the following cheats by entering the corresponding codes:

CHEAT FUNCTION - CHEAT CODE
Free materials - nwcambrosia
Auto game play - nwcgosolo
Win combat - nwcares
Lose combat - nwcachilles
Gain skill - nwcathena
Increase level - nwcthoth
Learn spells - nwcisis
Lose scenario - nwcragnarok
Win scenario - nwcvalhalla
Unlimited movement - nwchermes
Reveal puzzle map - nwcsphinx
Maximum luck - nwcsacrificetothegods
Maximum morale - nwcpan
Build all structures - nwccityoftroy
Access cheat menu - nwcimagod
Shroud FOV - nwcprometheus
Elven chainmail - nwchephaestus
Dagger Of Despair - nwcettubrute
Ring Of Greater Negation - nwcexcalibur
Sword Of The Gods - nwcnibelungenlied
Crusaders - nwctristram
Champions - nwclancelot
Angels - nwcstmichael
Dwarves - nwcsevenlittleguys
Magi - nwcmerlin
Titans - nwccronus
Vampires - nwcblahblah
Devils - nwchades
Trolls - nwcunderthebridge
Minotaur - nwckingminos
Nightmares - nwcxanthus
Black Dragons - nwcfafnir
Sprites - nwcdoyousmellbrownies
Wolves - nwcfenrir
Elves - nwcfixmyshoes
Unicorn - nwcthelast
Phoenix - nwcra
Ogre Magi - nwcvalkyries
Behemoth - nwcgrendel
Sea Monster - nwcposeidon
Tatooed White Trash - nwcaphrodite
Old Man Jack - nwcoldman

Complete a quest and save the game, then load it again. You can double your reward each time.