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