Most, if not all games mentioned have multiplayer. Yea, so does Assassin's Creed, but it sucks.
SP is pretty fun, though.
I never bothered with the multiplayer myself. Ubi should stick top what they do best.
I only played ACII and Brotherhood, and they're both brilliant games 
played each of them through in 10 days or less, on a friend's xbox 
Also, graphics are superb on Xbox, it was disappointing to see it on PS3 afterwards. Idk about Mac/PC
Graphics are awesome on the mac as well, at least at maxed out settings. Just finished replaying brotherhood yesterday at 84% sync
