Here is the full list of all 53 Weird West achievements.
End the world
Save the world
Spare Essex Mast at the end of the Oneirist Journey
Complete the Oneirist Journey
Return the Heathen’s Box unopened
Bring all the Journey Heroes back to the Broken Steppe Temple alive
Turn a Bounty Hunter into a Werewolf
Beat Pigman Joe at a Poker Game
Collect a bounty for turning in either Leila, Shelby Cross or Galen Weeks
Locate every Temple of the Ancients
Save both innocents in The Strangeness
Collect all 3 of Pigman Joe’s Tour du Weird West souvenir snow globes
Complete the Werewolf Journey
Read Sybil’s journal
Aid Essex Mast on his quest
Kill 3 enemies in less than 5 seconds in Wolf form
Rescue the missing Werewolf
Complete a quest given by a Ghost
Beat the Heathen at her Slap Game
Complete the Protector Journey
Return Glenn Mills’s rifle to Maryann
Retrieve the fallen Sheriff’s star from the ruins of Boulder Creek mine
Collect the bounty on a Pigman or Ravenous
Turn a Tornado into an Elemental Tornado
Complete the Pigman Journey
Start a fight against a bear while drunk… and win
Roast a live chicken
Break into a building through the chimney
Serve time in jail
Turn a settlement into a ghost town
Turn one of your arrows into an elemental arrow
Catch 2 or more enemies in Chain Lightning
Turn Ruth into a Pigwoman
Kick someone off of a rooftop or cliff
Kill Maximo and free the Lantern room’s workers
Get your spouse out of the quarry without ever alerting Shelby Cross
Kick a flying Vulture
Knock someone out by dropping onto them from above
Recruit a previous Journey Hero to your posse
Complete the Bounty Hunter Journey
Read 50 books
Take down Shelby Cross in Copper Mountain Quarry
Dig up 10 mound caches
Recruit a full posse
Complete 10 side quests
Kill your first monstrous enemy
Recruit your first follower
Turn in your first bounty from the board
Use a Golden Ace of Spades to gain a perk for the first time
Use a Nimp Relic to gain an ability for the first time
Dig up your Bounty Hunter cache and suit up
Become a Wiindigo
Steal $10,000 worth of goods in a single playthrough