Here is the full list of all 17 Trapper Knight, Sharpshooter Princess achievements.
Clear the extra chapter (Hard mode).
Earn all the achievements.
Clear the final chapter.
Get Gritz and Leah's bond to Rank A.
Clear Chapter 18.
Clear Chapter 19.
Clear Chapter 16.
Clear Chapter 13.
Clear Chapter 12 after opening one of the chests.
Watch a bonding scene.
Clear Chapter 9.
Buy something at a shop.
Clear Chapter 4.
Open a treasure chest.
Get a Game Over.
Clear the Prologue
Trap a foe in a Bear Trap.