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Hunt the Demon Aristocracy in this neon-noir detective puzzle game. As an agent of the Njij Protocol, travel the globe, interview witnesses, and cross-reference clues in the Grimoire to profile the suspect before time runs out and history is lost forever.
Price history tracked since Jul 7, 2026 · vs all tracked offers.
Based solely on tracked price history — not purchase advice.
Tracked since Jul 7, 2026.
Steam Train Fest ends
The world sees only wealth and glamour in the penthouse suites, the VIP lounges, and the boardrooms. But the real power isn't human. It’s hiding behind the velvet ropes.
The Demon Aristocracy has surfaced. Masquerading as the human elite, these entity "collectors" are liquidating humanity’s history. From the Torch of Lady Liberty to the Imperial Seal of Japan, they are stealing our greatest artifacts to decorate their personal underworlds.
The NIJI PROTOCOL is now active, and it's your job to stop these thieves in their tracks!
Niji Protocol is a retro-styled detective puzzle game that pays homage to the classic "edutainment" deduction games of the 80s and 90s. As a field agent, you must track a thief across a global map, gathering clues to determine their next destination and their true identity.
But you aren't chasing common criminals. You are hunting demons.
TRAVEL across 30 neon-soaked cities, from the rainy streets of Neo-Tokyo to the frozen skyline of Toronto.
INVESTIGATE famous landmarks and interview local witnesses—from snooty Hotel Concierges to weary Street Vendors.
DECIPHER clues. Does the suspect have Red Skin or Blue Skin? Did they ask about the Yen or the Rupee? Did they flee toward a River or a Mountain?
Speed is essential, but accuracy is mandatory. You must correctly identify and catch the suspect before time runs out.
The Grimoire: Input the physical traits and habits you gather from witnesses. Filter the list of 24 High-Profile Demon Suspects to find your target.
The Seal of Banishment: You cannot make an arrest without the proper paperwork. You must positively identify the suspect and issue a warrant before the final confrontation.
The Confrontation: Corner the suspect at their final location. If your paperwork is in order, you banish them. If you guessed wrong... they escape with the loot.
Procedural Cases: No two investigations are the same. The suspect, the stolen artifact, the flight path, and the clues are randomized for endless replayability.
Neon-Noir Aesthetic: A unique visual style blending 1980s retro anime character designs with a high-contrast, blacklight-fantasy color palette.
Educational Trivia: Use real-world geography, history, and cultural facts to determine where the suspect fled.
Rank Up: Start as a Rookie with a plastic badge and work your way up to an Ace detective, unlocking harder cases and elite clearance levels.
Original Soundtrack: Investigate to the smooth sounds of a soundtrack tailored for the twilight of the 20th century.
The clock is ticking, Agent. The collection is almost complete. Will you stop them?
Lowest tracked price: €4.99 (Jul 7, 2026) · current best: €4.99.
100% positive reviews all-time.
Right now the cheapest offer for Niji Protocol is €4.99 at Steam. KingsPrice compares 1 offers from 1 stores — official stores and keyshops — and refreshes prices throughout the day.
The lowest price KingsPrice has tracked for Niji Protocol is €4.99 (recorded on Jul 7, 2026). This covers the stores and period we monitor — set a price alert to catch the next drop to that level.
Create a free price alert on this page and KingsPrice will email you when Niji Protocol drops below your chosen price. The biggest discounts usually appear during seasonal Steam sales and publisher promotions — the sale calendar on this page shows the next confirmed event.
