If you want to progress with the Pinocchio doll in the hard and dark “Lies of P”, you should solve all the secrets and unlock all the trophies. One of the secrets is the “Trinity Sanctums”.
There are a total of 5 Sanctums in the game and they are well hidden! But not only are they hard to find, you also need a special key for each Sanctum, a Trinity Key.
This guide will help you find all the keys to open all the Sanctums. The following trophy or achievement (if someone is playing on the Xbox) can be unlocked:
Lies of P Trinity Key & Sanctum Locations
Krat City Hall Courtyard
Trinity Key: Once you’ve unlocked access to the factory district, proceed onward until you encounter a bridge populated by numerous puppet-like creatures hurling explosives. Prior to crossing this bridge, veer to the right to discover the initial ringing telephone and its accompanying enigma. Answer: Human.
Workshop Union Culvert
Trinity Sanctum: from the Stargazer, go through the tunnel with the rolling ball of fire to return to eventually find the Red Fox and Black Cat. Continue past them and head right when you come to the split with the big red pipe. You’ll eventually find a green door on your right you can unlock using the Trinity Key above.
St. Frangelico Cathedral Chapel
Trinity Sanctum: you’ll eventually reach a section with an electrified ball rolling down in your path. Go up the first slope, then immediately check your right for a ladder. Climb it up to reach the Sanctum. You can open it once you have obtained the Trinity Key at Malum District.
Malum District
Trinity Key: when you reach the square with the Decay throwing enemies on the upper section, continue down the main path and you’ll come across the ringing telephone. Solution: Candle.
Estella Opera House Entrance
Trinity Sanctum: you’ll eventually reach a room with a massive hole in the floor and a swinging chandelier. Drop down and turn around to find the Trinity Sanctum. You can open it once you have obtained the Trinity Key at Grand Exhibition Gallery.
Grand Exhibition Gallery
Trinity Key: shortly after meeting Belle and activating the bridge shortcut, you’ll find the ringing telephone in your path. Solution: Egg. After giving the correct answer, you’ll receive a clue stating “Before the fingertips of the cold woman in the Grand Exhibition”. Continue on and when you get downstairs, check your right for two statues. One of them can be moved. Move it so that it reflects the one you can’t move. A secret compartment will then open and you can collect the Trinity Key. You can now use this Trinity Key to open the Trinity Sanctum at Estella Opera House Entrance.
Krat Central Station Lobby
Trinity Sanctum: from the Stargazer, head down the stairs on your left to find the Sanctum. You can open it once you have obtained the Trinity Key at Krat Central Station Street.
Krat Central Station Street
Trinity Key:from the Stargazer, walk through the archway, go left, right, and left again to find a ringing telephone. Solution: Ergo. Once the Stargazers reactivate, you’ll then be able to open the Trinity Sanctum at Krat Central Station Lobby.
The Chosen One’s Trinity Key: once you’ve obtained all Trinity Keys and opened all Sanctums, return to this ringing telephone and answer the next question either way. As a reward for answering all riddles, you’ll also get King of Riddles’ Surprise Box which you can open in your Collectible menu and obtain this Key.
Arche Abbey Outer Wall
Trinity Sanctum: when you reach the room with the beams in the middle, continue to the bottom floor to find the last Trinity Sanctum.