Here is the full list of all 19 Sixth Grade Detective achievements.
Publish an article in the school newspaper.
Play Swords and Sorcerors.
Buy your very own bike!
Get a makeover.
Finish the game without lying.
Destroy the mean notebook once and for all.
Help Evan come clean about his makeover business.
Get a book on codes and ciphers.
Finish the game without attempting to blackmail anyone.
Start multiple romances at the same time.
Find Red Lightning.
Follow the clues to your birthday present.
Get a pair of binoculars.
Find the source of the mean rumors.
Accuse the right person of stealing Shashi's books.
Start a romance.
Find a bike.
Get some fingerprint powder.
Figure out the identity of your secret admirer before the dance.