In order to either write cheats or use other console commands you first have to enable the debug console by adding the -cheat launch option to GalCiv's executable file. Once done, open the console with the default tilde(~) key, the key can be changed in input options. If the console has opened, type help to see a full list of the commands. For information on specific commands type help. For example: help modcredits. Note: If you use steam, go to library and right click on the Galciv3 game, and you will see properties. After that, in the default General Tab, click on the launch options button. Here, type in "cheat" and this will be added to the process launch of galciv3. For those that do not have steam, you will need to create a shortcut item of the Galciv3.exe, and then right click on it and go to properties. Notice the TARGET LINK, which has the direct path and name of the Galciv3.exe application. Here, append " cheat" to the line, thus adding this option during the process launch of galciv3.exe.

Code	Effect
Modcredits [amount]	The modcredits command will modify the local player's credits by the value provided.
colonize [all]	The colonize command will colonize the currently selected planet for the current local player.
fastunlock	A light weight unlock command that unlocks all the techs as quickly as possible This does nothing else and takes no parameters.
fow [player index]	The fow command will toggle the fog of war on and off It can also select which player'sfog of war to show based on player index[player index] - The player index of whose fog of war should be displayed.
god	Toggles the ability for the local player to control every player's empire.
lighting	Activates the lighting options in the main map screen.
losegame	Kills the local player Game will end.
modcult [amount]	The modcult command will modify the local player's culture (ideology) points by the value provided.
modpop [amount]	The modpop command will change the population of the colony on the currently selected planet This works for any player's colony.
resources	Toggles whether or not resources are required for building ships It will also grant 1000 of every type of resource.
spawnantimatter	Spawns an Antimatter resource in a random empty location (around a black hole)
spawnrelic	Spawns a Relic resource in a random empty location.
unlock [internal name]	The unlock command will unlock the specified tech for the local player If no tech name is given, then all techs and culture traits will be unlocked.
wingame	Kills all players except for the local player Game will end.