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