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As you playLies Of P, you will come across some green locked doors adorned with a strange white triangle symbol. At first, it may seem like there’s no way to open these doors, until you stumble upon ringing phones and the haunting words of the Riddle King. There are five riddles in total that you can solve to open these doors.
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When you successfully solve these riddles, you’ll obtain a Trinity Key. This key is mandatory for unlocking the doors commonly referred to as Trinity Sanctum or Trinity Doors. If you’re curious about the locations of these doors, you’ve come to the right place.
Trinity Door #1
You can findthe first Trinity Sanctumat the Workshop Union.
Once you arrive at the Workshop, continue your journey as usualuntil you reach the spot where you encounter the Red Fox and the Black Cat for the first time, near an elevator.
They’re easily identifiableby their costumes.
Close to them, you’ll noticea path on the left side that you should follow. Then,take a right turnandfollow it until you may take another left.
Keep following this path until you stumble upon your very firstTrinity Door on your left.

Use one of your Trinity Keys to unlock the door.Inside, you’ll discover a chest containinga Quartzandthe Blue Blood’s Tailcoat costume.
Trinity Door #2
To reach the second Trinity Sanctum, you’ll need toprogress further in the game until you reach St. Frangelico Cathedral.
Once you’re there, start climbing up using the ladders and platforms until you reachan area where a large electric boulder is rolling down.

To safely navigate this obstacle and continue upward,use the wooden platform on the right side for cover. The key here is tomove to the right after the boulder has dropped down.
After passing this section, you’ll come acrossa ladder on the right. Climb up it, and you’ll encounterthe same rolling boulder again.

The strategy remains the same;wait for it to drop down and then rununtil you findan entrance on the left side leading to a Trinity door.
Unlock this doorusing a Trinity Key, and inside you’ll find a chest withthe Black Cat’s Amuletandthe Monster Sweeper’s Hunting Apparel costume.

Trinity Door #3
The third Trinity Sanctum can be located at theEstella Opera House.
Once you’ve reached the room just beforethe boss fight against The King Of Puppets, you’ll easily recognize itby the burning chandelier swinging and the iron bridge.

Instead of proceeding forward,drop down to the lower floor and turn around to spot another Trinity Door.
The procedure remains the same:use a Trinity Key to unlock itand access the chest inside. This time, you’ll finda Quartzandthe Belford Superior Radiation Converter.

Trinity Door #4
You won’t come across the fourth Trinity Sanctum until you’re nearing the end of the game,during your second visit to Krat Central Station.
Upon reachingKrat Central Station Lobby Stargazer,head for the first set of stairsyou encounter, and thentake a left and take the stairs down to locate the Trinity Door.

Unlock it usinga Trinity Key, and inside, the chest will containthe Workshop Master’s Workwear costumeandCarrier’s Amulet +1.
Trinity Door #5
To unlock the last Trinity Sanctum, you’ll first need toobtain the Chosen One’s Trinity Key, which requirescompleting all Phone Riddles.
This door can be found withinArche Abbey, but you’ll need to make significant progress in this area to reach it.

As you navigate through theArche Abbey Outer Wall, you’ll eventually come acrossan area where you must descend using wooden platforms and ladders.
This is also the area where you’ll encounterTest Subject 826for the first time.

After reaching the ground floor, you’ll face a strong enemy, so make sure you defeat this enemy before you may interact with the door.
Once the enemy is defeated, you’ll easilyspot the last Trinity Door near a torch; it’s hard to miss.

As mentioned earlier,you’re able to unlock this door only with the Chosen One’s Trinity Key.
Unlike the other doors, here,you’ll finally come face to face with Arlecchino, the King of all Riddles, responsible for the Phone Riddles.
Interact with him, and he’ll share valuable lore with you. At a certain point, he’ll say andask you this:
“Now listen closely and heed the King’s speech. Or the answer to this one will stay out of reach! Are you a puppet? or a human being? Which one are you?”
You’ll have the option to choose between “Human” or “Puppet.”
The choice you make doesn’t matter, asit only affects how Arlecchino reacts to your answer. The reward, however, remains the same, and you’ll receive theAlchemist’s Cape costumeanda Quartz.
Completing this will earn you theEnd of Riddles achievement.
Should I Kill The King Of Riddles?
Once you hear the gruesome confession of Arlecchino, his fate is yours to decide. you’re able to choose to leave him be, or cut his puppet strings once and for all.While it seems like thisshouldimpactsomething, as far as we can tell, it doesn’t.
Even your dialogue with Venigni will remain unchanged. So, there is no punishment or reward. Just do whatever you feel is right.
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