
Niji Protocol
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ABOUT THIS GAME
Ancient Greed Unmasked in Niji Protocol
In Niji Protocol, players step into a neon-soaked world where wealth and glamour hide a sinister truth. Beneath the glitz of penthouses and VIP lounges lies the Demon Aristocracy, an ancient force masquerading as humanity's elite. This retro-styled detective puzzle game casts you as a field agent tasked with uncovering the real power behind the seductive façade and recovering stolen artifacts that threaten to erase human history.
Hunt Down Your Suspect Across Global Cities
Traverse an expansive global map featuring 30 cities dripping with neon ambiance, from the rainy streets of Neo-Tokyo to the frozen skyline of Toronto. Your mission requires gathering crucial clues at famous landmarks and interviewing a vibrant cast of witnesses, including snooty hotel concierges and beleaguered street vendors. Each encounter provides vital information on the demon you’re hunting, aiding your investigation as the clock ticks down.
Investigative Mechanisms: Clues and Traits
Each suspect presents a unique puzzle. As you gather details, pay close attention to physical traits and behavioral cues. Do local witnesses mention a character’s red skin or blue skin? These observations help filter the list of 24 high-profile demon suspects, narrowing your search to identify who’s responsible for the latest thefts.
The Logic Puzzle: Time and Accuracy Matters
But it's not enough to simply gather clues; accuracy is crucial. You must issue a warrant before the confrontation. The Grimoire allows you to input the evidence you've collected while determining your suspect's next move. The Seal of Banishment ensures you can arrest them—if your paperwork is complete. Guess wrong, and they escape with the loot, leaving you empty-handed.
The Dynamic Challenge of Procedural Cases
What keeps each investigation fresh are the procedural cases. Every playthrough shuffles the elements: no two pursuits are identical. The suspect, stolen artifact, flight paths, and clues change each time, inviting players to revisit the game for a new challenge and hundreds of hours of entertainment.
A Neon-Noir Aesthetic with Original Soundtrack
Visually, Niji Protocol stands out with its neon-noir aesthetic, seamlessly blending retro anime designs with a striking color palette. Each case is accompanied by an original soundtrack that amplifies the atmosphere, providing a sense of urgency and nostalgia as you navigate through each mystery.
Ascend the Ranks to Become an Ace Detective
Start your adventure as a rookie detective with limited resources, but as you unravel mysteries, you climb the ranks to become an Ace. With each level you gain access to harder cases and elite clearance levels, challenging your skills and pushing your limits as you fight to restore humanity’s artifacts from the clutches of demonic forces.
Will You Stop the Artifact Heist?
As the tension builds, the clock is ticking. Will you uncover the truth in time to prevent the Demon Aristocracy from completing their sinister collection? In Niji Protocol, the stakes are high, and only the sharpest detectives can navigate this thrilling blend of detective work and logic puzzles to emerge victorious.
Historical Low: $2.99 at Steam on 2026-01-28
Average Price: $3.99
Lowest Price Now: $4.99 at Steam


















