Check out some footage of the new puzzle game by one of the creators of the Portal series.
Quantum Conundrum is an upcoming first-person action video game currently in development by Airtight Games and set to be published by Square Enix. It is designed by Kim Swift, who formerly worked at Valve Software as the lead designer on the critically acclaimed Portal. The game is scheduled for release in early 2012 on Xbox Live Arcade, Playstation Network and Windows download distribution services
This game looks like another good physics puzzler. The style is a bit more kid-like though. One of the best things about Portal was the humor and I didn't even hear any character voices in the video. Not sure about this one.