Hit the ":" key. A command line should appear. Type "debug" and then hit enter. Now you are in DEBUG MODE. To use a cheat hit ":" again and type one of the following cheats. gold : gives 1000 gold
gold xxx : gives xxx gold
create xxx : creates unit xxx on currently selected tile
unit hitpoints=xxx : currently selected units hp changes to xxx
unit experience=xxx : currently selected units exp changes to xxx
unit moves=xxx : currently selected units moves changes to xxx

~Idanwin

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