I haven't played the game, though I've watched a little bit of it on Twitch.
Based off everything I've seen and heard going back to the Beta, I get the impression that two things have helped this game:
1. Bungie made it
2. Activision has done a masterful job of hyping the game
I expect the game will be extremely front-loaded in sales and don't expect it to be a system seller. It sounds like too mediocre a game to be otherwise. And don't forget this is on last gen hardware. That significantly cripples the game's ability to sell current gen hardware.
Author of science fiction and other genres, I write under the pen name Desmond Shepherd. The second season of my series The Permanent Man premieres on November 11, 2014. Pre-order the season premiere The Walls Have Ears on Amazon today!







