A 2007 first-person puzzle game by Valve in which test subject Chell uses a handheld portal gun to navigate the experiments of the sentient Aperture Science AI GLaDOS.
Origin
Portal grew from the DigiPen student project Narbacular Drop, whose developers Valve hired in 2005. The team folded the portal-traversal mechanic into the Half-Life universe and Source engine.
Gameplay
Players solve room-scale environmental puzzles with the Portal Device, which fires two linked portals onto white surfaces. Momentum is preserved between portals for slingshot-like jumps.
Legacy
Portal popularized the meme “the cake is a lie” and won the 2007 Game of the Year award. Its 2011 sequel Portal 2 expanded into co-op puzzle solving and a multi-act campaign with Stephen Merchant’s Wheatley.
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