http://www.pcgamer.com/a-new-portal-game-will-launch-this-month/ >Valve's ultra-smart, interdimensional puzzle-platformer Portal celebrated its tenth anniversary this year, and its equally intelligent sequel is somehow almost seven years old. Headup Games and Clockstone Software have now announced an official partnership with Valve that'll see us back at Aperture Laboratories before the end of 2017.  >Due two weeks from today, December 20, Bridge Constructor Portal combines Headup's lighthearted engineering sim with Valve's masterpiece, as it "blends the laws of structural engineering and technology straight from Aperture Laboratories into an exciting new game experience, all under the demanding gaze of GlaDOS."