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