Portal (PC) CD key

Portal is a puzzle game from first-person perspective, with an emphasis on the story. You will find yourself in the role of the main character Chell, who is involved in testing the new invention of a corporation called Aperture Science.  They are testing a so-called "portal gun", which is a manual device that can create portals that allow speedy travel in space. Portal is full of puzzles and humor. The approximately three-hour-long entertainment in the campaign is significantly expanded by the maps for advanced players that noticeably increase difficulty and the necessity to plan your every step. Start solving the puzzles or moving objects.