Overview
A detailed guide about how you can reach the hidden Psychiatrist boss fight in Katana ZERO. ( WARNING: There are many spoilers on this guide, only read it if you already beat the game or doesn’t care about spoilers after all )
Step 1: Hang Up in the Factory scenario & Ask for medicine
Well, to start it all you will wanna be at the Factory level. At the very start of the mission you will receive a phone call from the Psychiatrist. Hang up until you make him angry ( You will notice it because it will unlock the “Don’t Hang Up” achievement ) and then answer with a “Hello”.
At the end of the mission you will be at his psychiatry session, keep interrupting him and asking for medicine ( the highlighted in red options ) until he gives it to you.
Step 2: Be Nice / Rude to the Recepcionist & Ask for Medicine
After the Factory chapter you will be at the Murdower Hotel scenario. At the very start you will meet the recepcionist, now this is a important detail to be said, you see, most guides about how to unlock this secret boss fight tell you to be rude ( being rude will result in she dying at the end of the mission ) and anger the recepcionist, but after doing some runs I noticed that being nice ( being nice will result in she staying alive and will also unlock extra dialogue and interations along the game ) or rude to her doesn’t affect the unlocking of the boss fight after all, you essentially only need to anger the Psychiatrist every time you can during the campaign.
That said, after you get to the end of the mission, once more you will need to keep interrupting the Psychiatrist and ask for your medicine. ( Keep choosing the highlighted in red options ).
Step 3: Speak to DJ Electrohead About Drugs & Refuse Medicine
After the past missions you will be at the Club chapter, quite straight scenario, get trough all the guards and then you will receive a phone call from you-already-know-who where he will say to you that you must “Not talk to Electrohead”. Well, you will be doing exactly the opposite, talk to Electrohead and ask him about the drugs. No matter what you choice, after talking a bit, Electrohead will be killed either by you or by V. ( The blue haired thug that shoots him and runs away ).
The next step is very important, and it goes as it follows: At the end of the mission, you will be at another psychotherapy session, however, in this one you need to be patient and choose to refuse your medicine. To do this simply ask about the drug, you will know that you doing right once you hit the following choice scene.
Step 4: Killing Spree At The Prison
Once that you refused your medicine, you will get a dossier that has nothing but “KILL” written on it, what means that you are in the right path. After reaching the prison, you will receive a phone call from Tragedy, one of the masked men that appear later in the game, he will tell you to kill all the cops and leave no survivors and that is exactly what you are going to do.
Step 5: Tell “♥♥♥♥ YOU” to The Psychiatrist at the Chinatown session
Well, once you finished the Prison level and reached the Chinatown chapter, you must talk with The Psychiatrist during the Chinatown session and say “F*ck you” to him, that will make him furious and shout at you. Don’t worry, all the events during Studio 51 / Mansion chapters are irrelevant, because they will not interfere with the unlocking of the boss fight.
Step 5.5: See If It Worked
Once you did everything listed before, you can now check if the boss fight is coming by simply going to the psychiatrist session in the Bunker. During this session the Psychiatrist will be very emotive and will behave differently from the other sessions. He will say: “I’m almost disappointed that you’re still alive, after what you’ve put me through”. Once you get this dialogue, you will know for sure that you have unlocked the boss fight.
Step 6: Activate The Psychiatrist Boss Fight
Finally, once you did everything listed back before and also confirmed the optional step, it’s time to activate your so desired epic battle! To activate it, go to the final session in the Bunker Part 2. During this session you will get the boss fight once he says ” You’re making a very big mistake “. The combat will then start. If you want, you can check my Optional Step 7, where I explain the boss attacks, moves and patterns, but it’s way more fun if you discover these by yourself, anyway, Good Luck and my most sincere thanks for reading my guide!
Optional Step 7: How To Beat It
Stage 1: At the start, the boss is invulnerable. Giant hands will appear from portals in the room walls and attempt to hold Zero in place. Zero can use his katana to destroy hands from portal. If they grab Zero, the psychiatrist will quickly blow Zero’s head up unless Zero struggles fast enough.
Stage 2: The Psychiatrist will create several clones of himself that shoot energy balls. These balls can be reflected back at him.
Stage 3: Now things will get complicated. The scene becomes dark and giant eyes will appear. If they are not destroyed by Zero fast enough, they will insta-kill him. At the beginning there are 2 eyes, then 5 eyes, then 4 eyes but on 4 screens, then 4 eyes on intersecting screens, then three but on an upturned screen, then 5 but the screen is bizarrely covered with the game UI.
Stage 4: The Psychiatrist final form is a giant and bizarre monster with many attacks:
1. A tall syringe stabs at Zero from the ceiling.
2. Syringes appear from portals and are sent downward.
3. Several small monsters appear from portals in the ground. They shoot the same energy balls as in Stage 2.
4. Syringes appear in a circular pattern and are shot at Zero one by one.
5. A mangled psychiatrist form will come out from a portal and attack Zero using several energy balls. During this attack, you must hit the Psychiatrist to weaken him. After being hit several times, the Psychiatrist will die.
