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