Cleaning House: This mission just might be the best one of all. Talk to Antonio, the head of the thieves guild and you'll at first get a cut scene and a memory sync, without having to do anything. Talk to him again, however, and you'll get a mission to identify and kill some traitors. The nearest traitor is in an area just north of you, so head toward the green area on your map.
You can use eagle vision to spot the traitor glowing gold in the area. He's on one of the largest boats in the water, just off the docks to the north. If you just swim right up to his boat, his alert guards will spot you and make a stealthy kill impossible. But if you swim underwater, you can get up along the southern side of the boat and cling to the side, a position from which you won't be spotted. For more info, watch the whole gameplay.
This is an Assassin's Creed II walkthrough for Mission 42: Cleaning House.
Mahalo's Assassins Creed 2 Walkthroughs are more than enough information for you to play the game yourself, and they teach you everything your need to be prepared for when playing yourself. This video walkthrough focuses on Mission 42: Building Blocks / Cleaning House.
Assassin's Creed 2 by Ubisoft is the action-adventure video game playable on PlayStation 3, Xbox 360, Sony PSP, and Nintendo DS video game consoles, along with Microsoft Windows. It is the direct sequel of Assassin's Creed and revolves around Ezio, and is set in Renaissance Italy. Ezio befriends Leonardo da Vinci, who provides experimental weapons and gadgets, and takes on Florence's most powerful families and ventures throughout the canals of Venice, where he learns to become a master assassin. The Assassin's Creed 2 gameplay is a mixture of action, stealth, and acrobatics.