There are 4 assassin's creed games before this one. You'll gonna have to play all of them if you want to know what's going on. I just play the first sequences of 2 and quit playing, my little brother took over for me. Now I play AC3 and I now regret never finish AC1, AC2 and brotherhood, revelations. I'm currently playing AC2 and going after brotherhood. I'm just gonna read Wikipedia for revelations I heard is a let down game.