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