Here is the full list of all 15 Inspector Waffles achievements.
Complete the Woolball card album.
Find the eighth Woolball card.
Finish the game.
Finish Chapter 4.
Find the seventh Woolball card.
Find the fifth Woolball card.
Find the fourth Woolball card.
Find the sixth Woolball card.
Finish Chapter 3.
Find the third Woolball card.
Find the second Woolball card.
Finish Chapter 2.
Find the first Woolball card.
Finish Chapter 1.
Start investigating the crime scene.