ɪt fˈɑːloʊd ðə pɹˈoʊɾɐɡənˌɪst, ɡˈoːɹdən fɹˈiːmən, æz hiː dʒˈɜːnid tə ðɪ ˈɑːɹktɪk ænd bˈoːɹdᵻd ðə bˌoːɹɪˈælɪs, ɐn ɛkspˌɛɹɪmˈɛntəl vˈɛsəl kɹiːˈeɪɾᵻd baɪ ˈæpɚtʃɚ sˈaɪəns.
It followed the protagonist, Gordon Freeman, as he journeyed to the Arctic and boarded the Borealis, an experimental vessel created by Aperture Science.