@kcoun
C:\Program Files\2K Games\Firaxis Games\Sid Meier's Civilization IV Colonization\Mods\AgeOfDiscoveryII\Assets\XML\GameInfo\CIV4GameSpeedInfo.xml
In this file, you'll see something like
All you need to do is change the settings for the Marathon speed. You could alternately add a new speed, but I think it requires you to edit additional files.
iTurnsPerIncrement - how many turns you will play on this setting
iMonthIncrement - in a 300 turn game, this is set to 12. If you want to maintain the timeline of the game (and not be finishing turn 1200 some time in the 22nd century) you will need to lower this in proportion to the turns you add
iGrowthPercent, iStoragePercent, iConstructPercent, iFatherPercent , iGreatGeneralPercent also need to be adjusted if you want to keep your game fair (leaving these values but increasing the turns allowed will make victory conditions easier to achieve).
With the exception of iGrowthPercent, the relationship between these variables and iTurnsPerIncrement is linear. To make your new speed, divide your new iTurnsPerIncrement by 300, multiply the GAMESPEED_NORMAL values by the quotient, put the product in the GAMESPEED_MARATHON fields.
For iGrowthPercent, the stock values are as follows:
Turns: 300 = Growth: 100
Turns: 450 = Growth: 200
Turns: 900 = Growth: 600
Math isn't my forté, so I'm having some trouble determining an exact relationship between these three points.
If you have a mod that already has a "Domination" mode, I would suggest finding those settings and using them.
C:\Program Files\2K Games\Firaxis Games\Sid Meier's Civilization IV Colonization\Mods\AgeOfDiscoveryII\Assets\XML\GameInfo\CIV4GameSpeedInfo.xml
In this file, you'll see something like
Spoiler :

All you need to do is change the settings for the Marathon speed. You could alternately add a new speed, but I think it requires you to edit additional files.
iTurnsPerIncrement - how many turns you will play on this setting
iMonthIncrement - in a 300 turn game, this is set to 12. If you want to maintain the timeline of the game (and not be finishing turn 1200 some time in the 22nd century) you will need to lower this in proportion to the turns you add
iGrowthPercent, iStoragePercent, iConstructPercent, iFatherPercent , iGreatGeneralPercent also need to be adjusted if you want to keep your game fair (leaving these values but increasing the turns allowed will make victory conditions easier to achieve).
With the exception of iGrowthPercent, the relationship between these variables and iTurnsPerIncrement is linear. To make your new speed, divide your new iTurnsPerIncrement by 300, multiply the GAMESPEED_NORMAL values by the quotient, put the product in the GAMESPEED_MARATHON fields.
For iGrowthPercent, the stock values are as follows:
Turns: 300 = Growth: 100
Turns: 450 = Growth: 200
Turns: 900 = Growth: 600
Math isn't my forté, so I'm having some trouble determining an exact relationship between these three points.
If you have a mod that already has a "Domination" mode, I would suggest finding those settings and using them.