Press [Tab] in the game and type in:

 nwcagents                      Fill empty slots with 10 black knights
 nwcbluepill                    Lose game
 nwcfollowthewhiterabbit        Maximize Luck
 nwcignoranceisbliss            Hides world map
 nwclotsofguns                  Get all war machines
 nwcmorpheus                    Maximize Morale
 nwcnebuchadnezzar              Unlimited movement
 nwcneo                         Get a level
 nwcoracle                      Reveal puzzle map
 nwcphisherprice                Change games colors to a weird color scheme
 nwcredpill                     Win game
 nwctheconstruct                Get 100,000 gold and 100 of each resource
 nwcthereisnospoon              Get 999 mana and all spells
 nwctrinity                     Fill empty slots with 5 archangels
 nwcwhatisthematrix             Reveal world map
 nwczion                        Get all buildings

 These codes do also work in "Conquest of the Underworld" and "Master of
 the Elements"