Fact Sphere



The Fact Sphere is a corrupted personality core that appears in the single-player campaign of Portal 2.

The Fact Sphere speaks like a stereotypical "know-it-all", spending most of its time rapidly rattling off various facts. While a small portion of the listed facts are true, most of them are incorrect and downright illogical.

The Fact Sphere, along with all the corrupted cores, is voiced by.