What impacted Halo 5's sales the most?

[Norris2k]

LipeJJ said:

Combination of factors:

1- Halo 4 being a disappointment to most fans
2- Halo: MCC having big online issues at launch
3- Releasing at the same timeframe of both Fallout 4 and CoD: BOIII and other major games
4- 343 Industries not having the fame of Bungie
5- Destiny taking away some of the audience
6- The series not being innovative anymore

I would also add, as a factor, than to sell more you need to push hardware sales more, and it's harder given the PS4 competition (in the 360 area, you would get Halo, but also for 100$ less than the PS3 better multi-platform games, and some say a better controller for FPS).