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