A collaborative diplomacy mechanics system for an online game is described. A player selects an ally to be engaged in a combat mode of an online social game against an enemy. The profile of the selected ally is retrieved. An ally power up weapon is generated based on the profile of the selected ally. The ally power up weapon is applied against a combat unit of an enemy of a player in the combat mode. The ally power up weapon can also be applied on a combat unit of the player in the combat mode.