I tried jumping into the water in AC1. It got real. People can't swim back then I guess.
It's all around an okay game although it does have a lot of bugs. For example the bug where swarms of guards (millions) attack you. And some issues with controls as well.
As for AC:R, the fact that Ubisoft incorporated a RTS Tower-Defense system kind of pissed me off. It was not only impossible to reach 100% but it was stupid cause you're adding more to the game play.
My final thoughts on the Assassins Creed games.
7/10. It could be a lot better. The bugs are annoying. AC2 did prove to me though that they really fixed a crap ton of issues that AC1 had. The story line is nice. I'll buy the new Assassins Creed but before I usually watch walkthroughs to confirm if I want it.