So, I don't know how I managed to miss this, but Kim Swift, Portal's lead designer, has a new project in the works: Quantum Conundrum. The game is being developed by indie studio Airtight Games and will be published by Square Enix. In any case, the new walkthrough video linked on Joystiq earlier today caught my eye:
The puzzles have a definite Portal vibe, and the visual style looks straight out of a Pixar movie, but Quantum Conundrum very much looks to be its own thing. There's a unique cleverness about the puzzles that has my interest piqued. And check out that plot synopsis:
In Quantum Conundrum, players take on the role of a young kid dropped off on his uncle's doorstep for the weekend; his uncle just so happens to be the brilliant, eccentric inventor, Professor Fitz Quadwrangle. Upon entering the Professor's vast manor home retrofitted with crazy technology to test his latest hypotheses, players quickly realize their uncle has gone missing. Fortunately, players soon gain access to Professor Quadwrangle's latest invention, the Inter--Dimensional Shift Device, which, at the press of a button, will shift the world around them to an entirely new dimension. In order to find him, players must use the newly found IDS Device to dynamically change the world to and from a variety of different dimensions to progress through the complicated Quadwrangle Manor. While on the journey, becoming adept at utilizing the various dimensions will help them trek from one bizarre and challenging room to the next. It might sound easy enough, but it is a tall order for a kid in a giant puzzle of a manor!
From what I've been able to gather—mainly based on this this CES interview with Kim Swift and Joystiq's coverage of the reveal announcement—Quantum Conundrum is due for a summer release on Steam, Xbox Live Arcade, and PlayStation Network.