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.
Complete a full run in hard mode.
Defeat the psychiatrist's final form.
This will go well...
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.
Found all the hidden keys.
Didn't wake up Leon.
Achieve a total rank of gold or higher in a full speedrun.
Found what the robber left behind.
Fulfilled your secondary goal in the prison.
You stopped a suicide. With a murder.
Most people go right. You went left.
Your trap card was activated.
Kill yourself in an elevator.
You ruined his fresh track suit.
You killed a suspiciously familiar character on the Quiet Hills set.
Poor guy.
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.
Beat Katana ZERO.
Complete The Dragon's tape.
Meet your final end in chinatown.