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.
Defeat the psychiatrist's final form.
Your trap card was activated.
Kill yourself in an elevator.
You ruined his fresh track suit.
You really liked petting that cat.
Found all the hidden keys.
Didn't wake up Leon.
Poor guy.
Found what the robber left behind.
This will go well...
Jump off the balcony of the penthouse.
Why did you think it was a good idea to give him your Katana anyway?
You stopped a suicide. With a murder.
Most people go right. You went left.
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.
Beat Katana ZERO.
Complete The Dragon's tape.
Meet your final end in chinatown.
You killed a suspiciously familiar character on the Quiet Hills set.
Fulfilled your secondary goal in the prison.