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