Portal: Singularity Collapse
PuzzleExplore a new wing of Aperture Science focused on the creation of Portal Guns. Play as a scientist, traversing it's dilapidated remains after an unforeseen...
After waking up on Iris island, the only thing Chell remembers about why she's there is that she signed up to help with scientific research for the IRIS initiative, a classified research project by the Aperture Foundation For Science. She quickly realizes that she is on her own... mostly.
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