The game was initially scheduled for a late 2017 launch.
Konami has announced that it's pushing back the release date of its upcoming multiplayer title, Metal Gear Survive until 2018. The representatives cited that the game needed a bit more polish before it could be released.
The publisher told Polygon that the game was delayed to afford more time to the development team for polishing it. Kojima has been asked before if he had anything to do with Metal Gear Survive, but he responded that he did not, saying that including zombies into the mode wasn't really something that fit within his vision for the series.
As far as fitting into the story of the rest of the series, Metal Gear Survive will take place in an alternate timeline that takes place after the events of Metal Gear Solid V: Ground Zeroes. Fans of the series were very upset with Konami and how they treated Hideo Kojima, and the fact that the series creator isn't involved any more has many feeling like the series should just end.
With Metal Gear mastermind Hideo Kojima out of the picture at Konami, the company has chose to go on with the series in a bold new direction.
Although it was originally slated to release this year, Konami now says the game will land on PC, PS4, and Xbox One in early 2018.