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!
Beat the third boss.
Level 9, see a smiley face.
Get a knife modification.
Find and complete the secret ending.
Complete all the levels.
Play Pong in the game.
Level 29, play as a scroll.
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.
Kill 50 enemies.
Level 11, go to "prison".
Beat 10 levels without dying.
Beat 5 levels without dying.
Beat the first level
Kill 25 enemies.
Beat the first boss.
Beat a level with an A+ time.
Die 100 times.
Explode 50 times
Die 50 times.
Attempt a level 25 times.
Attempt a level 10 times.
Beat level 4 with controls reversed.
Fall for it on level two.
Complete one secret.