SYNCHRONIZING MISSION PROGRESS IN PEER-TO-PEER COOPERATIVE GAMES

Methods and systems are described for a multiplayer video game on a peer-to-peer network in which a player's or players' missions are tracked individually as mission lines, each mission line being composed of a series of ordered objectives. Each objective generally must be completed in order of the sequence with no forking of objective paths. Each objective can include one or more conditions that can be completed in any order within the objective. Players can go off on different missions and then come back to synchronize their mission progress so that they benefit from the other player's gameplay. Players can also synchronize the conditions achieved within the missions during long missions with many difficult conditions to achieve in order to advance their combined progress.