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For other uses, see Guthrie (disambiguation).

Sgt. Guthrie is a Black Mesa security guard whose name can be heard in a Black Mesa Announcement System announcement, "Sergeant Guthrie, report to Topside Motorpool immediately.".

Behind the scenes

Like his scientist namesake, "Guthrie" is a nod to John or Mona Lisa Guthrie, employee at Valve, placed there as an Easter egg.

List of appearances

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