Here is the full list of all 23 Duck Season PC achievements.
Survive the zombie attack
Dog
Stuck forever
Set the table for dinner
Cannon Ending
Flip the sign in the game world
Shot the sun with the golden shell
Shoot all the cattails in game world
Platoon ending
Watch all the VHS tapes
Beat All Cartridge Games
Use the Kid Wizard Book
Don't shoot the dog in a playthrough
A better game
Shoot the sitting duck in the game world
Its over, you lose
Kill 100 Ducks
Kill two ducks with one shot
Inspect the globe
Throw something out the window
Tried to get Mom's attention
Shoot the dog more than once in a playthrough
What time is it really?