The game has a "capture the flag" mode already in the mechanics. It has just been disabled. It was in the beta and disabled prior to release, but there is thread here somewhere, where someone, i don't recall who, buggered i think, found the code in the lua's and re-enabled the mode.
Think of it as a an early mod before modding was released. If if can find the thread in question, this should be an easy enough mod to do..i'll get on it after my latest batch of new favor items is done.
Here is the journal from the beta for those interested.
http://forums.demigodthegame.com/336472/page/2
And just a quick summary,
New Game Modes: Joining the original Conquest mode are Dominate, Slaughter, Fortress and Capture the Flag. You can currently achieve victory by either completing the game mode's conditions or by destroying the Citadel. You can also set default options for each game mode.
- Dominate: Control the flags on the map until you reach a specified War Score.
- Slaughter: Kill opposing Demigods.
- Fortress: Defend your own forts while demolishing your enemy's forts.
- Capture the Flag: Capture and return the enemy banner. You cannot capture the banner unless your own banner is safe at your base.