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