It's 1191 A.D. and Acre is still not safe from the clutches of the Templars. Altair is once again at war with the seemingly never ending Templars to find the Apple of Eden. No one knows what this strange artifact can truly do, but Altair doesn't want them to be the first to find out.
If you were disappointed to find out that Assassin's Creed II wasn't a true sequel to the first game, look no further. Bloodlines is the first game's only and true sequel. Those who played the original will be on familiar ground as Bloodlines is almost exactly like the first game - both in good and in bad. You still play as Altair and can run, hop and skip to your heart's desire as you play the story through. The main difference, however, is that Desmond Miles is nowhere to be seen, as Bloodlines only concentrates on Altair's story. There are some other rather interesting differences here as well, so you'd better read further.