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To earn The Postman trophy in The Outer Worlds: Peril on Gorgon, you will need to deliver Olivia’s journal to Lucien.
At the very beginning of the game when you first meet Wilhelmina “Minnie” Ambrose, speak with her then immediately kill her. Head back to the Unreliable and travel to the Gorgon Landing Pad. Lucien Bancroft will message you via Ada asking you to retrieve Olivia’s journal. Once you obtain the journal, choose to side with Lucien and complete the Gorgon quest line to obtain The Postman Trophy!
