New alliance feature called "The Metropolis", a city that is built by alliance members to benefit the alliance. Alliance members contribute gold, wood and other luxury resources to an alliance city where buildings can be built to benefit all aspects of the game. You would have your Royal Palace building that would dictate the maximum levels of your other buildings. My recommendation would be to start at just levels 1-5 and each level opens up an additional building spot to add other types of buildings. The following are the types of buildings and benefits that can be made.
- The Royal Palace – Would have its own population that increases with each level. This population can be used to conduct researches at the u niversity (see building description below), increase alliance gold reserves, maintain the upkeep of the armory, or used in the resources mines of the Metropolis (for Metropolis use only)
- Alliance Treasury – used to increase gold production of all alliance members. Each building level increases the gross gold production of alliance members by 2%. The treasury can also be used as an alliance gold bank where gold can be sent to alliance members.
- The U niversity (had to separate letters since this is I guess a censored word) – A building used to advance the research of the alliances military capabilities and economies. The economy side will provide a 2% increase to alliance members cities population at each level. On the military side it will provide opportunities similar to the workshop but will effect the alliance as a whole. (the military aspect will probably be the hardest thing to code and would recommend this maybe be implemented at a later time if needed).
- The Armory – This is essentially an alliance military bank. Troops and ships stationed here would still incur upkeep of some level maybe reduced from the normal amounts. Troops and ships can then be distributed to alliance members at no cost but must be sent by ships bought from the alliance treasury.
- TBD – This building would provide a 2% increase to all the resource production at the alliance members towns and the Metropolis.
This new feature would require a new leadership position called the Governor who is in charge of directing distribution from the armory, choosing which researches to conduct, how many citizens to staff the mines, and any other items that need completing.
Similar features to this have come to many games I have/currently play such as Vikings and Clash of Clans. It allows the alliance to have a common goal for upgrades and allows those who may not be as active in wars or conversations to provide additional contributions to the alliance.