Not hard at all. More than "casual gamer," but not by much. And you should definitely play the first one. The main story of the two is very much interwoven, and there are a lot of details and intricacies to the story you wouldn't either pick up on or appreciate if you didn't play the first.
Yoda of Borg are we: Futile is resistance. Assimilate you, we will.
to be honest i didnt really like assassins creed 1 but it will make assassins creed 2 all the more interesting, id say play through the frist one, (only missions not any side ones), then play number 2 for the full adventure... it is pretty hectic bra well worth playing
I don't think you need to play AC1 first. You might experience some slight confusion in the story but you can always come here and ask if you would like more explanation. Go ahead and play this game; it's really fun.
Lisa Murphy A friend is someone who will visit you in jail. A good friend is someone who sits beside you in jail saying, "Damn, that was fun".