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