Those anxiously awaiting the reveal of Valve’s next game may be surprised (and possibly disappointed) to hear that it is a spin-off of the Portal series called Bridge Constructor Portal.  The title is being worked on in conjunction with Headup Games and original Bridge Constructor developer Clockstone Software.

Bridge Constructor Portal will blend the laws of structural engineering and technology straight from Aperture Laboratories into an exciting new game experience, all under the demanding gaze of GLaDOS.

The game is planned to launch later this month on December 20th for PC, Mac, Linux, iOS, and Android.  Console versions are also planned for releasing sometime next year.