Here is the full list of all 24 Chess Knights: Shinobi achievements.
Complete the hidden jigsaw
Complete the collection
Burn the castle down
Assassinate the shogun successfully
Collect the item from the tenth secret stage
Collect the item from the ninth secret stage
Collect the item from the eighth secret stage
You shouldn't sound more alarms
Alert an enemy about your presence
Assassinate your second target successfully
Collect the item from seventh first secret stage
Use the height difference to be unseen
Collect the item from sixth first secret stage
Stand against a more powerful enemy
Assassinate your first target successfully
Collect the item from the fifth secret stage
Collect the item from the fourth secret stage
Collect the item from the third secret stage
Hide from your enemies using the environment
Complete your training
Collect the item from the second secret stage
Teleport yourself using a smokebomb
Collect the item from the first secret stage
Complete 5 levels without losing any ninjas