Ninja Theory, the UK-based developer most commonly know for their work with PS3 exclusive Heavenly Sword, is working on another 'top secret project', according to the studio co-founder Tameem Antoniades. 

"We've just started pre-production on a new secret project," said Antoniades in a recent interview.  "It's a full scale, it's a pretty big project.  It's still top secret, but it's gonna be awesome, obviously."

Ninja Theory is working on the project concurrently with Enslaved, a Namco Bandai-published post-apocalyptic third person action game.  Antoniades also confirmed that the game is not a portable or download.

Though Heavenly Sword may have not lived up to the gargantuan amount of hype that was built around it, it was still a really good game, so I'm eagerly anticipating both Enslaved and whatever their new project is!