Sentinel 1: The Zero Sum Game

Sci-FiUnsolved Cold CaseSci-Fi MysteryAI JudgeDetective GameSingle PlayerHigh StakesHardImmersive Sim

An AI judge finds you 98% guilty of murder. Use its own evidence to find the truth and lower your guilt in a race against time to survive execution.

Dive into the most immersive unsolved cold case online. In SENTINEL, you aren’t just a detective; you are the lead suspect in a trial where the verdict is already written.

The year is 2026. Los Angeles is governed by the Mercy Court—a fully autonomous AI justice system designed to act as judge, jury, and executioner. You are Dr. Aris Thorne, a brilliant chemical engineer whose logic is now being used against him. The tables have turned. You stand accused of the brutal murder of your wife.

The Sentinel AI has analyzed your digital footprint, your movements, and forensic data from the scene. Its verdict? 98% Probability of Guilt. In 90 minutes, the fatal pulse will be delivered. Your only hope is to use the Sentinel’s own interface to scour the evidence, revisit the crime scene, and find the 'glitches' in the facts.

To survive, you must dismantle the case piece by piece. Lower your guilt percentage to below 60% by uncovering hidden truths the AI ignored. Can you solve the most personal cold case in history before the clock hits zero? Or will you become another statistic in the perfect system you once admired?

Beta NoticeSentinel 1: The Zero Sum Game is currently in beta. The core mystery is fully playable, with ongoing polish and balancing updates in progress.

Difficulty: Hard
Players: 1
Estimated Duration: 1.5-2 hours

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CASE FILE REF: MMP-SENTIN

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The Zero Sum Game takes the classic cold case format and turns it on its head. Instead of being an outside detective, you are the prime suspect with a 98% guilt rating. The twist is that your judge is a flawless AI, and all the evidence is presented through its digital interface. You must re-examine facts that have already led to a verdict, making it a high-stakes investigation into your own life.

Sentinel's logic is perfect, but it lacks human context. Your goal isn't to prove the AI made a mistake, but to provide it with new data that forces a recalculation. By analyzing digital footprints, smart home logs, and drone footage, you can find 'glitches' in the narrative—evidence of human emotion, motive, or opportunity that the machine miscategorized. Each discovery lowers your guilt percentage and gets you closer to survival.

This isn't a traditional trial about guilt or innocence; it's a battle of probabilities. To win, you don't need to find the real killer or prove yourself 100% innocent. You simply need to introduce enough new evidence to lower Sentinel's guilt calculation to below 60%. This creates enough 'reasonable doubt' for the AI to stay its own execution order, making every piece of evidence critical to your survival.

This case is perfect for players who love high-stakes thrillers, sci-fi mysteries, and escape room-style pressure. If you enjoy analyzing evidence, challenging logic, and racing against a clock, The Zero Sum Game offers a challenging single-player experience. It’s for the detective who wants to solve the most difficult and personal case imaginable.

What You'll Receive

Each Cold Case File contains high-quality printable evidence, immersive documents, layered clues, and hidden codes that challenge your logic and creativity. Perfect for an unforgettable evening of mystery and deduction.

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