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