According to thi post on the Deus Ex: Mankind Divided official site, the developer has moved the release date to August 23 he does not want to “compromise on quality”. The game was set to release on February 23, 2016 for PlayStation 4, PC, and Xbox One.
David Anfossi the head of Eidos Montreal studio said in a statement
“As you may have already seen by reading and watching the many previews for Deus Ex: Mankind, our aim is for it to be a worthy successor to Human Revolution, and to improve upon that game in every way possible. I know that expectations are extremely high, and we not only want to meet those expectations, but exceed them,”
“We’re confident and proud of the game so far. However, as we are now playing through the game in full we can see that it will require more time in post-production for tuning, iterations, and refinement to meet our high standards. In order to achieve this, we need to move the release of the game to August 23, 2016.”
The studio has apologized for the delay