Here is the full list of all 30 Save the Ninja Clan achievements.
Kill 50 enemies.
Attempt a level 25 times.
Explode 50 times
Die 100 times.
Level 11, go to "prison".
Beat the first boss.
Level 9, see a smiley face.
Kill yourself with your own weapon.
Kill 25 enemies.
Die 50 times.
Attempt a level 10 times.
Fall for it on level two.
Complete one secret.
Beat the first level
Beat level 4 with controls reversed.
Beat a level with an A+ time.
Beat 5 levels without dying.
Beat 10 levels without dying.
Beat the second boss.
Beat the third boss.
Complete 10 secrets.
Unlock something.
Find and complete the secret ending.
Complete all the levels.
Collect 15 Collectables.
Level 19, crash the game.
Beat half the levels.
Play Pong in the game.
Level 29, play as a scroll.
Level 25, ride a cloud.