A remaster of Assassin's Creed II included with Assassin's Creed: The Ezio Collection.
All the single-player add-on content (The Battle of Forlì, Bonfire of the Vanities) is included and multiplayer is removed.
Stuck and need some help? Check out some of the questions the community have asked relating to this game. If none of these answer your problem or you want to get some tips when it comes to a particular level, feel free to submit a question of your own.