(Image source:https://www.forbes.com/sites/erikkain/2017/04/18/what-horizon-zero-dawn-needs-to-learn-from-dark-souls-and-far-cry/#656688be2a25)

Horizon's Success.

As of June 5th, Horizon Zero Dawn has sold more than 3.5 Million copies, 2.6 millionof those in its first 2 weeks of release. The game is still selling strong with its first DLC announced at E3 2017, called The Frozen Wilds.

The reason for its popularity is simply because of the fun you have on it, with a mix of great graphics, a fantastic story, and its ability to not feel repetitive. Oh and who can forget the machines, what's better than a dinosaur, a mechanical dinosaur with LASERS!!

Some Facts You Might Not Know.

Horizon Zero Dawn is developed by Guerilla Games, the development studio famous for the Killzone games.
It runs on the DECIMA engine, the same engine made for the Killzone FPS. As you might imagine they had quite a lot of problems using the DECIMA engine, they edited it while developing Horizon.
Development started in early 2011, with a sneaky reference to the development in Killzone Shadowfall, a hologram of the Corruptor's early stages can be seen.
Guerilla Games actually canceled development of another game so that they can focus all the development on Horizon.
Horizon Zero Dawn was one of 20 games pitched to the Guerilla Games devs, it was ultimately chosen because it was the most risky.

The Analysis.

Horizon has a few flaws in my opinion. Firstly, once you complete the final mission and watch through the final cutscene, it puts you back to the game before the final mission was started. Correct me if I am wrong but I believe it was because the devs did not do high quality textures for the damages done on the Horizon maops, and or Keep alll those deathbringers on the map. But non the less, I was not expecting that, not only don't you get to see what the damages ae, but the world doesn't know you safed it, non of those cool and funny NPC's congratulating you and thanking you for safing the world from Hades and Total extinction....AGAIN!!!

(Image Source:http://es.memegenerator.net/instance/62611863/what-if-i-told-you-what-if-i-told-you-i-just-saved-your-life)

Secondly, I've seen a lot of Duplicate NPC's like the Sister of Ranaman (Daradi) looks exactly like Talanah Khane Padish at the Hunters Lodge, I might be mistaken, if so I apologize, One particular voice I could recognize was that of the male voice actor for the main protagonist in Fallout 4, was one of the Shadow Carja Guards.(Fact Source:http://www.imdb.com/title/tt4044024/fullcredits/)(Rest of crew sorted alphabetically)