How do I unlock the ending where Arthur helps Mary Linton?

To unlock the ending where Arthur helps Mary Linton in Red Dead Redemption 2, you must complete a series of specific missions and make certain moral choices throughout the game. This ending is tied to Arthur''s honor system and his relationship with Mary, which is developed through optional missions. Here''s a detailed guide to achieving this outcome.\n\nFirst, you need to encounter Mary Linton early in the game. She appears in Chapter 2 during the mission ''We Loved Once and True,'' which is triggered by reading a letter from her at the camp. This mission is optional, so make sure to check your camp mailbox regularly. The letter will prompt you to meet her in Valentine, where she asks for Arthur''s help with her brother, Jamie, who has joined a cult. Completing this mission is the first step in building Arthur''s relationship with Mary.\n\nAfter completing ''We Loved Once and True,'' you will receive another letter from Mary in Chapter 4. This letter leads to the mission ''The Fine Joys of Tobacco,'' where Mary asks Arthur to help her father, who is in trouble with a loan shark in Saint Denis. This mission is also optional, so keep an eye on your camp mailbox. Completing this mission further strengthens Arthur''s bond with Mary and influences his honor level.\n\nTo unlock the ending where Arthur helps Mary, you must maintain a high honor level throughout the game. Honor is influenced by your actions, such as helping strangers, donating to the camp, and making morally good choices in missions. Avoid committing crimes, killing innocent people, or antagonizing NPCs, as these actions lower your honor. A high honor level is crucial for unlocking the ''good'' ending, where Arthur prioritizes helping others over personal gain.\n\nIn Chapter 6, Arthur''s health deteriorates due to his illness, and the game presents a choice between helping John Marston escape or going back for the gang''s money. To achieve the ending where Arthur helps Mary, you must choose to help John. This decision aligns with Arthur''s redemption arc and reflects his high honor. After this, Arthur will have a final conversation with Mary, where he expresses his regrets and hopes for her future. This emotional moment is only available if you completed her missions and maintained high honor.\n\nOne common challenge players face is missing Mary''s letters or failing to complete her missions. To avoid this, regularly check your camp mailbox and prioritize optional missions involving Mary. Another challenge is maintaining high honor, especially if you prefer a more chaotic playstyle. To boost your honor, help strangers in need, greet NPCs politely, and donate to the camp fund. These small actions add up over time.\n\nIn summary, unlocking the ending where Arthur helps Mary Linton requires completing her optional missions, maintaining high honor, and making selfless choices in the game''s final chapters. By following these steps, you can experience one of the most emotionally impactful endings in Red Dead Redemption 2.