page_title: Portal (series)
section_title: Setting and characters
hierarchical_section_title: Portal (series) / Setting and characters
context_page_description: Portal is a series of first-person puzzle-platform video games developed by Valve. Set in the Half-Life universe, the two main games in the series, Portal and Portal 2, center on a woman, Chell, forced to undergo a series of tests within the Aperture Science Enrichment Center by a malicious artificial intelligence, GLaDOS, that controls the facility. Most of the tests involve using the "Aperture Science Handheld Portal Device" - the "portal gun" - that creates a human-sized wormhole-like connection between two flat surfaces. The player-character or objects in the game world may move through portals while conserving their momentum. This allows complex "flinging" maneuvers to be used to cross wide gaps or perform other feats to reach the exit for each test chamber. A number of other mechanics, such as lasers, light bridges, tractor funnels and turrets, exist to aid or hinder the player's goal to reach the exit.
  The Portal games are noted for bringing students and their projects from the DigiPen Institute of Technology into Valve and extending their ideas into the full games. The portal concept was introduced by the game Narbacular Drop and led to the basis for the first game.
context_section_description: Both Portal games take place in the fictional "Aperture Science Enrichment Center". Aperture Science was founded by Cave Johnson (voiced by J.K. Simmons) and originally sought to make shower curtains for the military. Its research happened upon the discovery of portal technology, and soon became a direct competitor with Black Mesa Research Facility (from the Half-Life series) for government funding. Johnson acquired the rights to a disused salt mine in the Upper Peninsula of Michigan, where they started building a labyrinthine set of offices, laboratories, facilities, and test chambers. During this time, Johnson became poisoned from exposure to moon dust, a key component of the paint needed for the portal technology, and became increasingly deranged.
  In Portal 2, the player explores these long-abandoned areas of Aperture, learning that the company had moved from testing on the country's finest, to paid volunteers, and ultimately to forcing its own employees to participate in testing. Near the point of his death, Johnson ordered his lifelong assistant Caroline (voiced by Ellen McLain) to be the first test subject for a mind-to-computer transfer; her personality would ultimately form the core of GLaDOS (also McLain). Sometime after Johnson's death, the old sections of the facility were vitrified, and a more modern facility built atop those ruins. GLaDOS was built to control the facility and monitor the tests, but researchers found that the computer had villainous tendencies, threatening to kill the entire staff before it was shut down in time. The Aperture researchers constructed a number of "personality cores" that would fit onto GLaDOS to prevent her from turning against them.  Despite this, on the day she was officially activated (coincidentally on "Take Your Daughter to Work Day"), she turned against the researchers and killed nearly everyone in the facility with lethal doses of neurotoxin gas. In the games and the comic Lab Rat, one employee Doug Rattmann survived due to his schizophrenia and distrust of GLaDOS. In trying to find a way to defeat GLaDOS, he finds that Chell, one of the human subjects kept in cryogenic storage within Aperture, has a high level of tenacity, and arranges for the events of Portal to occur by moving her to the top of GLaDOS' testing list. GLaDOS remains driven to test human subjects despite the lack of humans.
  The player is introduced to Aperture in Portal, which is said by Valve to be set sometime between the events of Half-Life and Half-Life 2. The player-character Chell is awakened by GLaDOS for testing. Chell resists GLaDOS' lies and verbal ploys and succeeds to defeat GLaDOS' core, the destruction creating a portal implosion that sends Chell to the surface, unconscious. Rattmann, who has helped Chell by writing warning messages and directions to maintenance areas on the facility walls and had observed the final battle, escapes Aperture, but on witnessing a robot dragging Chell's body back inside, sacrifices his escape to assure that Chell is put into indefinite cryogenic storage. He himself is critically wounded but appears to make it to another cryogenic chamber, though his ultimate fate is not revealed.
  Portal 2 takes place numerous years after the events of the first game; the Aperture facility has fallen into disrepair without GLaDOS. A personality core named Wheatley (Stephen Merchant) wakes Chell from her sleep to help her stop a reactor failure, but inadvertently awakens GLaDOS, who had backed up her personality. Though they defeat GLaDOS by putting Wheatley in her place, Wheatley is overwhelmed with power, sending Chell and GLaDOS, temporarily reduced to a small computer powered by a potato, to the old core of Aperture, where GLaDOS rediscovers her relation to Caroline. They return to the surface where they are forced to defeat Wheatley before his ineptitude with the Aperture systems causes the facility reactors to become critical and explode. GLaDOS is returned to her rightful place and returns the facility to normal. GLaDOS then lets Chell go, realizing that the prospect of t
caption: One of the in-game logos for Aperture.