Your actions in The Outer Worlds directly impact your reputation with various factions, such as Spacer's Choice, the Board, the Iconoclasts, and MSI. Completing quests for a faction increases your positive reputation, while acting against them decreases it. High positive reputation unlocks vendor discounts and unique perks, while negative reputation can lead to hostile encounters. Pay attention to the reputation changes displayed after completing quests, as they can significantly affect your gameplay experience and access to certain areas or items.
