Here is the full list of all 79 Westerado: Double Barreled achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
You found all the endings!
You were the Murderer.
You just became the biggest star here, since there isn't anyone left except for a few extras.
Talk to Oilrig Manager at every drilling location.
The Beefheads playing for the other side
Beat the game in less than an hour
Unlock all hats at the Haberdasher.
Too much PDA, bro.
Sheriff's worse than when you met him
It speaks louder than words.
Your mother loved an Indian, and was hiding them in the walls.
He has such great personalities
Mrs. Tressabell Johnston
Keep Rancher Bob, Bell and Cobb alive during the Mansion Attack.
Peace between Indians and Military
Mrs. Tressabell Sheriff
Sheriff's back to kicking Ass
The sheriff helped you 3 times
Lost Miner reunited with Miner's Wife.
Magnificent might be a bit of stretch, but the Seven part is undeniable.
Beat the game with less then 20 kills
Your Dad was the Murderer.
They were all in on it!
Buffalo wearing hats and stripes.
From mayhem to meats, the Beefheads did it all
You know exactly what's on his person.
Prevent any packages from being stolen during the Carriage Protection.
He had it coming to him.
Rancher Franchise Made.
Keep all buffalo alive during a Buffalo Drive.
Beat the game as the Indian
Like playing monopoly
Two thousand dollars in the bank. It's a lot of money. Takes me three years to earn it!
Beat the game as the Sister
Your family wouldn't give up their land.
Unfold the secret of the animal statues.
It sh*ts money
The banditos are back to causing trouble.
Lost Miner and Miner's Wife both move on.
Unlock all Weapons
Find the Movie Set
Unlock all playable Characters
Retake our land!
Help the Indians get past the Military Blockade.
Free all of the Buffalo enslaved by the Ranchers.
Beat the game as the Brother
Beat the game without getting shot
A side of justice with your revenge?
You pretty much shot more people than actually exist, congratulations!
He shot you? That's not what is supposed to happen.
Now where is that deputy?
Sister got the river in Santa Anna flowing again.
Can't read my...
They read it, you weep.
Come on now, what did those lizards ever do to you?
That buffalo wasn't even wearing the right hat.
Trains back in town
Beat the game as the Gunslinger.
Explore all the things
Explore more
Where do you think you're going?
Dispatching justice will require style!
You just can't keep your hands off the stuff.
Convince the Ticket Salesman that you're from the Transcontinental Express.
Explore 100% of the map
Digging beyond the veil.
Finally got that Miner's Hat.
This again? We know we just gave you a gun, but you might not want to shoot everyone.
Mrs. Tressabell Gunslinger
A place to start over.
Obviously you had to shoot all those people, they were coming right for you!
Don't go thinking you're Annie Oakley, those three hatshots in a row were just a fluke.
Explore 50% of the map
So you had to shoot a few people, right? No big deal.
Soberly together again.
Bla, bla, bla. You just keep jabbering on.
Make the graveyard safe to visit.
Sadly we have no knives, so you won't be running any faster.
Onwards, adventure awaits!