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