I’ve gone through 'Red Dead Redemption 2' a few times and love talking about its structure — the big-picture is pretty tidy. The game is divided into six main numbered chapters (Chapters 1–6) that contain the core story missions that drive Arthur Morgan’s arc. On top of those, there are two epilogue sections, often called Epilogue Part 1 and Epilogue Part 2, which also contain major story missions that wrap up the larger narrative and bridge into the events of 'Red Dead Redemption'. So if you’re counting every block of the game that presents primary narrative missions, you’re looking at eight story blocks total: six chapters plus two epilogues.
Each numbered chapter contains multiple main missions — some long set-pieces, some quieter character beats — and the epilogues function like short chapters of their own, with several important missions each. Players sometimes debate whether to call the epilogues “chapters,” but functionally they offer major story missions and a conclusion you don’t want to skip. There are also many side quests, stranger missions, and post-launch additions that are separate from these main blocks.
For me, that eight-block layout is one of the things that makes 'Red Dead Redemption 2' feel so deliberate: the pacing shifts as you move from chapter to chapter, then the epilogues give you that final, bittersweet coda. I always appreciate how the game treats its ending like a proper chapter of story, not just an afterthought.