Xbox LIVE Gamerscore & Achievement Leader Stallion83. First Ever 1,000,000 Gamerscore achieved on 3.13.14
As someone with a "measly" 10,000 points, this is my favorite series/franchise of games. and I don't think you'll be disappointed (until the end)
I recommend you finish it. especially if you are going to play revelations when it comes out. the ending is ridiculous and you will be totally lost.
Got all possible achoevements on this one except counting the ones from DLC and 2 from multiplayer