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