Here is the full list of all 31 Save the Ninja Clan trophies - there are 14 bronze, 10 silver, 6 gold and 1 platinum.
Good job! Completed all tasks!
Beat 10 levels without dying.
Beat 5 levels without dying.
Beat level 4 with controls reversed.
Find and complete the secret ending.
Play Pong in the game.
Get a knife modification.
Beat the third boss.
Complete all the levels.
Level 29, play as a scroll.
Beat a level with an A+ time.
Kill 50 enemies.
Level 25, ride a cloud.
Complete 10 secrets.
Kill yourself with your own weapon.
Beat the second boss.
Collect 15 Collectables.
Level 19, crash the game.
Beat half the levels.
Die 100 times.
Explode 50 times
Attempt a level 25 times.
Die 50 times.
Complete one secret.
Kill 25 enemies.
Level 11, go to "prison".
Level 9, see a smiley face.
Beat the first boss.
Attempt a level 10 times.
Fall for it on level two.
Beat the first level