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