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