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