"Shipwrecked" is an optional mission that can be accessed only while playing a special edition of “Assassin’s Creed 2” or after purchasing the “Bonfire of the Vanities & Secret Locations” downloadable content. The goal of this mission is to infiltrate the Templar Lair at Arsenale di Venezia. This is a restricted area, so guards always attack on sight regardless of your notoriety. The only reward for completing this mission is the florins found in the treasure chests at the end. This mission does not add any plot information to the story.
Swim under the gate at the beginning of the Arsenale di Venezia to move farther into the lair. The area you are in appears to be a dead end.
Climb the wall of the dead end to reach the ledge above you.
Climb on top of the ledge and climb the wall to your left.
Climb the stack of crates on the north wall. From here, jump to the platform to the right.
Jump onto the boat framework in the middle of the room. Walk north along the boat.
Jump onto the hanging platform to cross the gap between the sections of the boat framework. Jump onto the platform north of the boat.
Jump across the beams to the west of the platform to reach a pole. Swing from the pole to reach the next ledge.
Assassinate the Brute after the short cut scene that plays when you reach this ledge.
Follow the Agile that started to flee after you killed the Brute. He leads you straight to the treasure room.
Open the door the Agile runs to in order to access the treasure room. Open the treasure chests to complete "Shipwrecked."
There are two versions of the “Bonfire of the Vanities DLC.” You must get the version with “Secret Locations” in the title to access the Shipwrecked mission if you do not have a special edition version of “Assassin’s Creed 2.”