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 ruined his fresh track suit.
Defeat the psychiatrist's final form.
This will go well...
Kill yourself in an elevator.
Found all the hidden keys.
Didn't wake up Leon.
Found what the robber left behind.
Poor guy.
Why did you think it was a good idea to give him your Katana anyway?
You stopped a suicide. With a murder.
You really liked petting that cat.
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.
Your trap card was activated.
Jump off the balcony of the penthouse.
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.