Portal

You awaken in a seemingly empty laboratory and are forced to complete physics-based puzzle challenges across a series of test chambers. As you progress, you use the new Aperture Science Handheld Portal Device, but you’re given no clear explanation of how you got there, why you’re being tested, or wh...

Portal reveals its story through GLaDOS’s audio “announcements” and visual details hidden in later test chambers. According to The Final Hours of Portal 2, the timeline is set “somewhere in 2010,” twelve years after Aperture Science abandoned the Aperture Science Enrichment Center. The game opens with Chell waking in a stasis bed as GLaDOS—an artificial intelligence—delivers instructions and warn...