A 2011 first-person puzzle sequel by Valve in which Chell reactivates GLaDOS and traverses a derelict Aperture Science facility alongside Wheatley and PotaTOS.
Story
Decades after the original, Chell awakens in a deteriorated Aperture facility. The hapless Wheatley accidentally reactivates GLaDOS, beginning a multi-hour single-player campaign that descends through abandoned 1950s Aperture levels.
Gameplay
The sequel introduces new puzzle elements including propulsion gel, repulsion gel, conversion gel, light bridges, and tractor funnels. A separate two-player cooperative campaign stars the bots Atlas and P-body.
Legacy
Portal 2 is widely regarded as one of the finest puzzle games ever and received numerous Game of the Year honors. Its writing, voiced by J.K. Simmons, Stephen Merchant, and Ellen McLain, is frequently cited as a benchmark for video game comedy.
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