I expected it to sell less than previous Halos. It's fifth in series and many of the original fans must have moved on already. Heck, I bet some of them are senile these days. Also it's hard to jump in now since you don't know what's going on with the story.
That said, sales are a bit disappointing compared to previous Halos but I still expect it to reach huge numbers. Gears4 will probs be lowest selling Gears game, Judgment aside.








