Here is the full list of all 22 Katana ZERO achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Achieve a total rank of gold or higher in a full speedrun.
Complete a full run in hard mode.
Found all the hidden keys.
Your trap card was activated.
Defeat the psychiatrist's final form.
Fulfilled your secondary goal in the prison.
Beat Katana ZERO.
Kill yourself in an elevator.
Didn't wake up Leon.
You ruined his fresh track suit.
Most people go right. You went left.
Complete The Dragon's tape.
In 1962, the Orlons released one of the all-time greatest doo wop hits, Don't Hang Up. Google it. Anyway, you hung up your phone a lot.
Meet your final end in chinatown.
You stopped a suicide. With a murder.
Found what the robber left behind.
Poor guy.
You killed a suspiciously familiar character on the Quiet Hills set.
This will go well...
Why did you think it was a good idea to give him your Katana anyway?
Jump off the balcony of the penthouse.
You really liked petting that cat.