Reflecting on the development process, 343's Frank O'Connor said that there were a ton of things the team could have done better, before promising to try harder for future releases.
Screenshot gallery - view Halo 4 images below:
Copyright: Microsoft Games"Halo 4 is the best and fastest-selling Halo game in the series," writes O'Connor on the Halo Waypoint blog.
"It won critical acclaim. It won awards, from 'Best Graphics' at the VGAs to 'Game of the Year' at the Inside Gaming Awards. We altered the engine. We expanded the universe. We innovated in storytelling, technology, and even marketing.
"It wasn't flawless by any stretch of the imagination, but by most objective criteria, it was a resounding success.
"So we know we have a lot to do. And we know we have a lot to learn. But we also know that we now have the capacity, the teamwork, the technology and the experience to do much better next time."
He added: "There are a ton of things we wish we'd done better: Features that didn't make it into the final game. Glitches that emerged. Missteps made. DLC fiascos. Communication breakdowns. But there were things that went astonishingly well - the creation of a genuinely competitive AAA studio chief among them."
Halo 4 was released last November, with its launch accompanied by an extravagant aerial performance in London.
The game is set four years after the events of Halo 3, marking the return of iconic hero Master Chief and representing the beginning of a brand new saga.
In addition to the single-player campaign, Halo 4 features a robust multiplayer offering through War Games, which take place on the Spartan training ship Infinity and tie into the game's story.
The game experienced a number of server issues at launch, including connection, matchmaking and ranking problems.
> Digital Spy's 'Halo 4' review
Watch a trailer for Halo 4 below: