What are the hand to hand combat techniques in Assassins Creed?

I'm looking for Fist Fighting Styles and Techniques that were used by the lead characters of the video game franchise Assassin s Creed. Yet I have found none. Any idea what those techniques and styles are? Or if they even exist or commonly used in the real world? If you know, please state the technique and the assassin or character that used it.

Thanks!