Unlocking secret rooms across Krat is one of the most rewarding endeavors in Lies of P. By answering cryptic phone calls throughout your journey, you can collect special keys that open hidden doors containing valuable gear and upgrade materials. Understanding where to find each telephone riddle and its corresponding Trinity Sanctum ensures you never miss crucial loot.
Solving Riddles for Early Trinity Keys
The first telephone riddle appears near the Krat City Hall Courtyard, where correctly answering the riddle with Human earns you your initial key. This key unlocks the Trinity Sanctum located deep within the Workshop Union Culvert, offering the Blueblood's Tailcoat and valuable Quartz inside.
As you progress to the Malum District, another ringing phone grants a second key when you correctly answer Candle. Take this key to the Trinity Sanctum inside St. Frangelico Cathedral Chapel to acquire the Black Cat's Amulet and Monster Sweepers apparel.
Mid-Game Sanctums and Hidden Puzzle Solutions
Reaching the Grand Exhibition Gallery introduces a unique twist where answering the riddle with Egg requires solving a nearby statue puzzle to reveal the Trinity Key. The corresponding door in the Estella Opera House Stage contains a powerful defensive converter and additional Quartz.
In Chapter IX near Krat Central Station Street, answering the telephone riddle with Ergo rewards you with the fourth key. Heading into the Krat Central Station Lobby allows you to open a hidden door containing the Carrier's Amulet +1 alongside Workshop Master's Workwear.
The Final Sanctum and Endgame Rewards
The final encounters at the Relic of Trismegistus and Arche Abbey lead directly to the King of Riddles himself. Obtaining the Chosen One's Trinity Key lets players open the ultimate Sanctum at the Arche Abbey Outer Wall. Inside, players interact with Arlecchino to claim the Alchemist's Cape outfit and earn the End of Riddles achievement.
