Katana ZERO

Katana ZERO

22 Achievements

1,000

20-25h

Xbox One
Xbox Series
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Prototype key

Prototype key

Fulfilled your secondary goal in the prison.

40

11.43%

How to unlock the Prototype key achievement in Katana ZERO - Definitive Guide

This achievement depends on your choice before chapter 4 "Prison".

This depends on your choice while talking to the the psychiatrist prior this mission - if you refused the medication, you have to kill everyone in the prison. The dossier will say something like "KILL KILL KILL KILL ...".
If you did take the medication like usual, you have to complete the prison stealthy without killing anyone.

The Achievement will unlock, once you pick up the Prototype Key infront of your apartment, after completing the level. (Thanks for the comment!)
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15 Oct 2020 17:54

7 Comments
so you have to kill them all or none in chapter 4, or 3?
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By Iggsy81 on 16 Oct 2020 06:15
I was confused as well..
In case you refused your medication in chapter 3, you’ll have to kill everyone in chapter 4. If you took the medicine in chapter 3, you’ll have to NOT kill anyone in chapter 4.
The achievement unlocks as soon as you pick up the Prototype key right before your apartment.
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By CrunchFlake on 17 Oct 2020 09:51
Ah! Thank you for the advice with the key, I'll add that to the solution!
And yes, like I wrote it: If you refuse the medication in the talk with the psychiatrist your goal for Chapter 4 is to kill everybody. Also your dossier will only say something like "KILL KILL KILL KILL ... "
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By BreakerShadow on 18 Oct 2020 10:48
How do you refuse medication in chapter 3?
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By SaucyAce on 22 Oct 2020 12:03
I was rude every time the psychiatrist wanted something from me.. hang up on the phone a lot of times, also interupted every of his speech and talked to the DJ. After that you can refuse the medication, while he tries to talk to you.
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By BreakerShadow on 22 Oct 2020 22:41
So what about if you took the medication and have to NOT kill any cops? Every guide out there seems to be to refuse the meds and kill everyone. I did the opposite and can't even get past the first set of cops :(

edit - NVM I am stupid. Keep forgetting I can jump down through the floor in some areas.
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By MikeL DD3 on 06 Jan 2021 13:20
Just FYI you need to kill all the guards in prison to get suitcase. There is a map with stairs going up and down and two guards below you cant miss.
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By UsCanAdam on 15 Oct 2021 23:20
View all 7 comments Show less comments
If you unlocked the REFUSED MEDICATION achievement you kill all of the guards in the prison. If you did not unlock the achievement you have to spare all the guards. When you return to your apartment building there will be a brief case waiting on you with the PROTOTYPE KEY inside.

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08 Nov 2020 17:07