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