Where can I find all dinosaur bones to unlock the "A Test of Faith" achievement?

To unlock the ''A Test of Faith'' achievement in Red Dead Redemption 2, you must locate and collect all 30 dinosaur bones scattered across the game world. This achievement is tied to the Stranger mission ''A Test of Faith,'' which becomes available in Chapter 2. The mission is given by Deborah MacGuiness, a paleontologist you can meet near Valentine. She will ask you to find dinosaur bones, and completing this task will reward you with the achievement.\n\nTo begin, you need to explore the vast open world of RDR2. The dinosaur bones are hidden in specific locations, often in remote or hard-to-reach areas. Each bone is marked by a small pile of white bones sticking out of the ground. When you approach a bone, you will be prompted to inspect it, and Arthur will sketch the bone in his journal. This marks the bone as collected, and it will be added to your progress tracker.\n\nFinding all 30 bones can be challenging due to the game''s size and the lack of in-game markers. However, you can use the in-game map and online guides to pinpoint their locations. Some bones are found in the snowy mountains of Ambarino, while others are hidden in the deserts of New Austin. For example, one bone is located near the ''E'' in ''Grizzlies East'' on the map, while another is found near the ''T'' in ''Tumbleweed.''\n\nA common challenge is accessing certain areas, especially in New Austin, which is restricted until the game''s epilogue. If you''re playing as Arthur, you won''t be able to collect bones in New Austin until you progress to the epilogue and play as John Marston. Plan your exploration accordingly, and focus on bones in accessible regions first.\n\nTo make the search easier, consider using the binoculars or a scoped rifle to scan distant areas for bone piles. Additionally, some bones are located near landmarks or unique rock formations, which can help you identify their locations. For instance, one bone is near the ''Window Rock'' landmark in Ambarino, while another is close to the ''Hanging Dog Ranch'' in Big Valley.\n\nOnce you''ve collected all 30 bones, return to Deborah MacGuiness to complete the mission. She will reward you with a unique dinosaur bone knife, and the ''A Test of Faith'' achievement will unlock. This achievement is a testament to your exploration skills and dedication to uncovering the game''s secrets.\n\nPractical tips for this achievement include using a checklist to track your progress, as the game does not provide detailed location markers. Online maps and guides can be invaluable for locating the bones efficiently. Additionally, ensure you have a reliable horse and plenty of supplies, as some locations require long rides through harsh terrain. Finally, be patient and thorough in your search, as some bones are well-hidden and require careful exploration.