Here is the full list of all 38 Hard West 2 achievements.
Finished the game on the Easy difficulty.
Finished the game on the Hard difficulty.
Finished the game on the Nightmare+ difficulty.
Completed all world map side objectives in Chapter 3.
Finished the game on the Normal difficulty.
Finished the game on the Nightmare difficulty.
Finish "One Last Ride" in no more than 12 rounds with all objectives completed.
Killed 666 enemies.
Killed 60 Hellspawns.
Form sets of Full House with 4 posse at the same time.
Collected every card in the game.
Form sets of Royal Flush with 4 posse at the same time.
Maxed out loyalty with Clalish.
Form sets of Straight with 4 posse at the same time.
Finish "The Great Train Heist" in no more than 10 turns with all objectives completed.
Maxed out loyalty with Flynn.
Maxed out loyalty with Lazarus.
Finish "Riftwalkers" in no more than 10 turns with all objectives completed.
Finish "Wanted: Lady Shrike" in no more than 15 turns with all objectives completed.
Killed 50 Shadow Dancers.
Finish "3:10 To Heaven" in no more than 1 round with all objectives completed.
Finish "A Plague Upon This Land" in no more than 12 rounds with all objectives completed.
Killed 80 Revenants.
Completed all world map side objectives in Chapter 1.
Finish "Frostbitten in Calla Calla" in no more than 10 turns with all objectives completed.
Finish "Flynn's Vision" in no more than 10 turns with all objectives completed.
Finish "O'Kane Farm" in no more than 8 turns with all objectives completed.
Completed a mission using only Melee weapons.
Killed 100 Bandits.
Completed a mission using only Rifles.
Completed a mission using only Shotguns.
Finish "Blasting Out" in no more than 8 turns with all objectives completed.
Completed a mission using only Handguns.
Finish "Fooling The Hangman" in no more than 4 turns with all objectives completed.
Finish "Daredevils" in no more than 8 turns with all objectives completed.
Maxed out loyalty with Old Man Bill.
Maxed out loyalty with Laughing Deer.
Visited every location in all Chapters.