Here is the full list of all 46 Super House of Dead Ninjas achievements.
Achieve a 6 minute speed run or less on "Ninja".
Achieve a 6 minute speed run or less on "Hard".
Beat the game in under 7 minutes
Complete Boss Rush on "Ninja".
Create 4 custom costumes
Collect 15 tickets
Kill 50 enemies with bombs in one game
Run through Transdimensional Leakage without killing any mushrooms
Score 2,000,000 points in a single game
Have a conversation with 10 ghosts in one game
Beat the game with Chaos Mode active
Kill 100 enemies with magic in a single game
Score 1 million points in Ninja mode.
Score 500,000 points in Ninja mode.
Collect 100 treasures
Reach the bottom of Abarghus' Domain on "Ninja" difficulty.
Complete Transdimensional Leakage on "Ninja" difficulty.
Complete the game on "Ninja" difficulty, starting from the roof.
Beat the game without ever using projectiles
Score 1,000,000 points in a single game
Beat the game without ever using bombs
Score 500,000 points in a single game
Complete the game with the One-Armed Ninja.
Publish a Custom Map
Play at least 10 custom levels
"Off with their heads!"
Beat the game on Hard / See the True Ending
Die 1000 times
Complete Boss Rush on "Hard".
Kill Disgust
Kill Horror
Kill Abarghus
Beat the game without ever using magic
Kill Doom
Score 250,000 points in a single game
Descend 50 floors without killing anything
Defeat the One-Armed Ninja
Kill 20 enemies with bombs in one game
Kill 5 enemies with bombs in one game
Collect nine hearts in one game
Kill Rage
Kill Torment
Kill 100 enemies in a single game
Achieve Rage five times in one game
Kill Spite
Kill 50 enemies in a single game