Full list of all 51 Red Dead Redemption 2 achievements worth 1,000 gamerscore. It takes around 200-300 hours to unlock all of the achievements on Xbox One.
Red Dead Online: You crafted 25 pieces of ammunition.
You found a permanent home for the squirrel statue.
Red Dead Online: You successfully countered a rival Posse's Free Roam mission.
You survived for 3 days holding a bounty of $250 in all states.
Red Dead Online: You achieved MVP 3 times (in a round with at least 4 players).
Red Dead Online: You concurrently owned 5 horses.
You spent $5000 across all shops.
Red Dead Online: You played 10 Free Roam missions.
Red Dead Online: You played 5 Free Roam Events.
Red Dead Online: You achieved 5 gold belt buckles from awards.
Red Dead Online: You crafted 20 items (excluding ammo).
Red Dead Online: You purchased 5 camp improvements.
Red Dead Online: You formed a Persistent Posse.
Red Dead Online: You completed a Free Roam mission as part of a Posse with at least 2 members.
Red Dead Online: You sold 20 items to the Butcher.
Red Dead Online: You reached Rank 10.
Red Dead Online: You took part in a Series.
Red Dead Online: You picked 25 Herbs.
You studied every animal across all states in Story Mode.
You skinned every species of animal in Story Mode.
You completed one of the Collectable strands.
You found the graves of each of your fallen companions.
Red Dead Online: You completed the Intro.
You completed the Epilogue.
You completed all optional Honor story missions.
You completed 'A New Jerusalem'.
You completed 'Red Dead Redemption'.
You discovered the fate of Marko Dragic.
You completed 'Goodbye, Dear Friend'.
You reached maximum or minimum Honor level.
You completed Chapter 5.
You completed Chapter 4.
You completed 10 Stranger mission strands.
You crafted 30 unique items in Story Mode.
You completed a Companion Activity in each camp.
You caught a fish weighing at least 16 lbs (7.3 kg).
You completed Chapter 3.
You upgraded each available component for a single sidearm or longarm weapon.
You recovered the stash from 4 homesteads.
You played all mini games.
You robbed or looted $250.
You delivered 5 camp companion item requests.
You completed Chapter 2.
You donated $250 to the gang tithing box.
You reached max bonding level with a horse.
You completed Chapter 1.
You completed 'Enter, Pursued by a Memory'.
Attain 100% completion.
Earn 70 Gold Medals in Story missions.
Survive 18 bear attacks and kill the bear each time in Story Mode.
Red Dead Online: Reach Rank 50.