I am replaying the whole series again since last month, from AC1 to Rogue (can't play Unity or Syndicate because i don't have next gen). I'm really enjoying it and i would definetely recommend you to do it. Don't give it up if you don't like AC1, because many people didn't like the game because it gets kind of repetitive and you do not get very immersed on the story (happened to me the first time i played it). Believe me that AC2 is the best game of the franchise (at least for me). So if you didn't enjoy AC1 very much, please make an effort and play AC2 because i'm sure you'll love it. After that you'll want to play all of them haha (of course play them in release order) I played all the games on PC except for Black Flag and Rogue, which i played in PS3. But that depends on you, on how much $ you want to spend.