Today's boss would like to throw you a party in honor of your tremendous success. There will be cake at this party, as well as a deadly neurotoxin. GLaDOS is a computer system whose dogged pursuit of science often comes at the expense of anyone employed by Aperture Science. To combat this all-seeing computer system and survive her decathlon of death, you'll need a functional Portal Gun and a handy knowledge of physics. And don't get too attached to that Companion Cube.
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