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.
Beat the game with less then 20 kills
You found all the endings!
Beat the game as the Indian
Beat the game without getting shot
Beat the game in less than an hour
Now where is that deputy?
Come on now, what did those lizards ever do to you?
Beat the game as the Brother
Beat the game as the Gunslinger.
Don't go thinking you're Annie Oakley, those three hatshots in a row were just a fluke.
You just became the biggest star here, since there isn't anyone left except for a few extras.
Explore all the things
Help the Indians get past the Military Blockade.
This again? We know we just gave you a gun, but you might not want to shoot everyone.
It sh*ts money
Rancher Franchise Made.
That buffalo wasn't even wearing the right hat.
A side of justice with your revenge?
You were the Murderer.
Retake our land!
From mayhem to meats, the Beefheads did it all
You know exactly what's on his person.
Mrs. Tressabell Sheriff
They read it, you weep.
The sheriff helped you 3 times
Your Dad was the Murderer.
Your mother loved an Indian, and was hiding them in the walls.
Keep all buffalo alive during a Buffalo Drive.
Peace between Indians and Military
Digging beyond the veil.
You just can't keep your hands off the stuff.
Your family wouldn't give up their land.
Mrs. Tressabell Johnston
You pretty much shot more people than actually exist, congratulations!
Finally got that Miner's Hat.
Convince the Ticket Salesman that you're from the Transcontinental Express.
Free all of the Buffalo enslaved by the Ranchers.
Mrs. Tressabell Gunslinger
Beat the game as the Sister
Magnificent might be a bit of stretch, but the Seven part is undeniable.
Unlock all playable Characters
Lost Miner and Miner's Wife both move on.
Sheriff's back to kicking Ass
The banditos are back to causing trouble.
Prevent any packages from being stolen during the Carriage Protection.
Keep Rancher Bob, Bell and Cobb alive during the Mansion Attack.
Make the graveyard safe to visit.
Two thousand dollars in the bank. It's a lot of money. Takes me three years to earn it!
Unlock all hats at the Haberdasher.
It speaks louder than words.
The Beefheads playing for the other side
Soberly together again.
Unlock all Weapons
Find the Movie Set
Trains back in town
Too much PDA, bro.
Like playing monopoly
Obviously you had to shoot all those people, they were coming right for you!
Lost Miner reunited with Miner's Wife.
Talk to Oilrig Manager at every drilling location.
Sister got the river in Santa Anna flowing again.
Explore more
Unfold the secret of the animal statues.
They were all in on it!
Buffalo wearing hats and stripes.
Sheriff's worse than when you met him
Can't read my...
Explore 50% of the map
Explore 100% of the map
He had it coming to him.
He has such great personalities
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.
Where do you think you're going?
Dispatching justice will require style!
A place to start over.
Bla, bla, bla. You just keep jabbering on.
He shot you? That's not what is supposed to happen.
Onwards, adventure awaits!