Here is the full list of all 45 Gunman Tales achievements.
Die 100 times
Eat 100x Mushroom
Drink 10x Antivenom Potion
Find the Alien Corpse
Use Medallion of Luck 10x
Finish the Game on the "ThumbSucker" Difficulty
Throw 100x Dynamite
Finish the Game on the "Clint Westwood" Difficulty
Gather 1K Dollars
Let Yourself be Killed by a Werewolf
Drink 10x Firewater
Use Old Spyglass
Drink 10x Health Potion
Bring a curse of "horse poop" upon yourself!
Kill 1K Enemies
Destroy 10 Cow Skull
Shoot the Goldfish 100x
Shoot the Chicken 100x
Visit the Indian Shaman 100x
Catch the 50 Cows
Rest 100x in Your House
Visit the Old Mine 100x
Donate 100 Coins for the Doctor
Slay the legendary Werewolf
Finish the Game
Find the Legendary Lost Treasure!
Find All Pieces of the Map
Win Stage 6
Win Stage 9
Win Stage 12
Win Stage 11
Win Stage 10
Win Stage 8
Visit 100x One of the Two Cities
Win Stage 7
Visit the Saloon 100x
Make 100x Combo!
Obtain Boots of Haste
Win Stage 1
Find the outlaw Dirty Willy and bring him back ...DEAD OR ALIVE.
Win Stage 4
Win Stage 5
Win Stage 2
Win Stage 3
Kill Your First Enemy