Sony has assured The Last Guardian fans that the game is still in development, but developer Team Ico has had to "re-do" work on the PlayStation 3 exclusive.
Sony Worldwide Studios chief Shuhei Yoshida reiterated that there are technical issues the team has been working on, with the exec assuring that the developer is instilling "a lot of work going into creating the title".
"The team is still working on it very hard. There are certain technical issues they've been working on. That's the period of time when the game, looking from the outside, doesn't seem to be making much progress. But internally there is a lot of work going into creating the title."
Sony Japan Studio, one of the studios assisting Team Ico with the development of The Last Guardian, had to re-do work that got the title to a playable form.
"We had the game playable. At one point we felt that it would be produced for a certain time period. That was the time we prematurely talked about the launch window. But it turned out the technical issues are much harder to solve. So the engineering team had to go back and re-do some of the work they had done."
Yoshida stressed that the long wait for The Last Guardian, which recently had its trademark abandoned, hasn't mean it'll be a PS4 title: "The game is developed on PS3".