Indie developer Playdead, makers of the critically-acclaimed gray-scale platformer Limbo (pictured, above), have decided to use the multi-platform Unity engine for their next project. The developer promises a more ambitious game this time around, estimating a three and a half year development cycle for the still-unannounced title.

In a recent interview with Edge Magazine, game director Arnt Jensen explained that the amount of work that goes into developing a proprietary engine and a game in tandem is a bit daunting. "It's like having a double product, doing both engine and game," he said, adding, "And our next project is a little more ambitious than Limbo so there are a lot of things we don't want to make from the beginning."

Playdead CEO Dino Patti's commentary on the new project is perhaps the most sobering, especially for folks who can't wait for the developer's next game. "A good game takes time," Patti said. "I think the new production will take at least three and a half years."

No further details about the game itself have been shared yet, but we'll be sure to keep an eye on new developments from Playdead in the next few years.