The games use a mission structure to follow the main story, generally assigning the player to complete an assassination of public figureheads or a covert mission. Alternatively, several side missions are available, such as mapping out the expansive cities from a high perch followed by performing a "leap of faith" into a haystack below, collecting treasures hidden across the cities, exploring ruins for relics, building a brotherhood of assassins to perform other tasks, or funding the rebuilding of a city through purchasing and upgrading of shops and other features. At times, the player is in direct control of Desmond, who by nature of the Animus use has learned Assassin techniques through the bleeding effect, as well as their genetic ability of Eagle Vision, which separates friend, foe and assassination targets by illuminating people in different colors. Through the Animus interface, the player can go back to retry any past mission already completed; for example, in Assassin's Creed: Brotherhood, the player achieves better synchronization results by performing the mission in a specific manner such as by only killing the mission's
The games use a mission structure to follow the main story, generally assigning the player to complete an assassination of public figureheads or a covert mission. Alternatively, several side missions are available, such as mapping out the expansive cities from a high perch followed by performing a "leap of faith" into a haystack below, collecting treasures hidden across the cities, exploring ruins for relics, building a brotherhood of assassins to perform other tasks, or funding the rebuilding of a city through purchasing and upgrading of shops and other features. At times, the player is in direct control of Desmond, who by nature of the Animus use has learned Assassin techniques through the bleeding effect, as well as their genetic ability of Eagle Vision, which separates friend, foe and assassination targets by illuminating people in different colors. Through the Animus interface, the player can go back to retry any past mission already completed; for example, in Assassin's Creed: Brotherhood, the player achieves better synchronization results by performing the mission in a specific manner such as by only killing the mission's