Often present in the form of spherical shapes, these cores are a more simplistic design as their purpose had been more at hand instead. The next cores developed were given the purpose of counteracting GLaDOS' psychotic behavior (such as flooding test chambers and other vital parts of the facility with neurotoxin) by integrating with her subconscious and altering her personality. Functionĭeveloped by Aperture Science technicians, GLaDOS is the earliest known personality core - specifically designed for becoming the Enrichment Center's overseer. The raw spherical appearance of the cores are heavily featured throughout the finale events of both Portal and the single-player campaign in Portal 2. Spherical cores that do not have limbs are generally attached to management rails in the Aperture Science computer-aided Enrichment Center. Input cores, by contrast, are elliptical in shape and are used for the turrets and in android bodies like P-Body's. Spheres are the standard form, used as a standalone body for Personality Constructs and in android bodies like Atlas'. Cores generally come in two varieties: spherical and input. Cores (also referred to as spheres, personality cores/spheres, or Aperture Science Artificial Personality Constructs) are machines designed to house advanced artificial intelligence, mostly unique for their ability to express emotions.

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