On the first level, you start at the end of some street. ignore the girl up ahead and use your grappling hook (press and hold Y and aim) and get to the first ceiling. To kill the guards down on the ground simply jump off and kill them one by one. Sooner or later a cinematic shows three (supposedly drunk) guys sitting and acting like idiots. Lead them out and then use the grappling hook to get on the roof and kill them just like you did those other guards. then run in and get the key and get to the door with the lock on it. go through and navigate through it. ( an easy way to kill the guy on the ledge is if you have the item that brings the guard towards you, use that and instant kill him) You should come to a room with a girl in it (kill her if you're bored) and then look up and you should seen a platform. find the ledge and then hook to it and get up. In the top right corner of the platform is a hole that leads up. Hook on to the side and climb up. There are four houses there, with your grapple, hook on to one and go to the one on the top left. Under it is a guard, jump off and kill him. then get back on the roofs and go to the top right one and jump across to the other ledge (kill the guards if you're bored) and go through the screen and you'll find yourself inside the house. All you need to do now is navigate through the house and find the evil merchant!
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