Various cheats

     Press F8, type code, then press [Enter]:

Code                           Result 
just for grant                 All Units Become Tanks 
hiho hiho                      Production Time of All Cities Set to 1 
purple heart                   All Units Receive Medals 
king of the castle             All Cities Become Citadels 
dragon rush                    All Units Become Dragons 
run spot run                   99 Movement for All Units 
there can be only one          100 Experience for Selected Hero 
but now i can see              Full Map 
not easy being green           Water Turns Green 
if i were a rich man           10000 Money 
show me the mana               20 Mana 
burn baby burn                 Burn Down All Sites 
i am lazy                      Conquer All Cities 
name that tune                 New Background Music 
lord of the mana               Cities Without Mana Get 1 Per Turn
free free free                 Unknown Effect
target practice                Unknown Effect 
learn spell                    Unknown Effect