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