Enzio's mission is to assassinate Carlo Grimalde, one of the most powerful men in Venice. In the original AC, you'd need to gather three sets of intel in order to unlock the ability to take out Grimalde. These tasks were somewhat menial and were a common complaint among critics. Ubisoft Montreal obviously agreed with the criticisms, because they threw that entire system out the window. That's right, you won't go to a handler to get a mission, then perform repetitive tasks to gain information that doesn't really assist you, kill the target and then have to return to that same handler. The mission's are a little more structured this time and any intel you need is going to be gathered as you progress towards the assassination.
Leonardo Da Vinci is Enzio's best bud and has a new invention waiting for him atop one of the roofs. Something that will help Enzio gain access to Grimalde. The ascension up the Venice rooftops is quick and easy. The climbing controls are unchanged from AC1, but you'll be able to perform longer acrobatic sequences, some upwards of half-a-minute. There's also a ton of new animations being added, though the demo didn't showcase many of these. Regardless, it still looks incredible.
As before, you have both high and low profile kills. So you can climb up a chimney, leap off and slam your blade down into a guard's back or take a stealthier, less flashy approach. Still, some of the stealth kills are pretty flashy in their own right. That's because Enzio has two hidden blades. You can sneak up behind two enemies and stab both in the back. Or casually walk between two guards and you can knife them both in the throat. Ubisoft is putting a lot of focus on the enemy AI this time around, but the short demo didn't really get to showcase much of this. What was shown fully was the device Enzio uncovered on the rooftops.