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