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