Naughty Dog will keep its existing in-house engine used in Uncharted and The Last of Us for the PS4, the developer has revealed.

Game director Bruce Straley explained how it won't repeat past mistakes of developing a new engine from scratch for a new console generation, as it did when it started work on Uncharted for the PS3.

"We learned a big lesson coming from PS2 to PS3," he told Digital Spy.

"There was a lot of hype over what next-gen was going to be. It was all going to be like movies, like a pre-rendered cutscene-style fidelity.

"That turned out not to be true. Granted, what we're able to do now is pretty damn close, but it took Naughty Dog four games to get there - one of the top developers in the industry with some on the most amazing scientists working in our programming department."

"We scrapped everything at the beginning of Uncharted 1, and we had a perfectly good engine with the Jak & Daxter franchise.

"We could have started with something there and then built off of it and only changed the pieces and parts as we needed, when we needed. And that really caused a lot of turmoil.

"Again, we were creating a new IP, with a new engine, with a lot of weird expectations. Nobody had a dev kit soon enough, and as we all know, trying to figure out how to program for a whole new piece of hardware was really difficult.

Straley continued: "We learned our lesson in saying, as we move into development into next-gen, we want to take our current engine, port it immediately over as is and say, 'Okay, we have a great AI system, we have a good rendering system'.

"We have all these things that already work. Only when we hit a wall will we say, 'When do we need to change something? When do we need to scale it?

"'When does the gameplay, when does the story, when does the world that we need to create - when does this engine hit the wall? Right, now we need to change this part of the engine.'

"Hindsight's 20-20, and it sounds obvious to say it, but it's one of those things that you learn in development. We've gained something from this experience, and now we want to apply it moving into next gen."

Gallery: View images of The Last of Us:Gaming Gallery: The Last of Us imagesNaughty Dog has been responsible for some of the PlayStation's most successful franchises, including Crash Bandicoot and Jak & Daxter.

The Last of Us stars Joel and Ellie as two survivors living in a post-apocalyptic United States overrun by zombie-like humans infected with a fungus-like virus.

Sony registered domains for The Last of Us sequels earlier this month, suggesting that it would be the start of a new franchise.

> The Last of Us preview: An unflinching, demanding post-apocalypse

The Last of Us will be available on June 14.

Watch a trailer for The Last of Us below:

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