WorldOS
D
Mystery

Detective: The First Case

A rookie detective. A body in the rain. Your first case.

WorldOS·
4500

Detective: The First Case

You are a newly-promoted detective pulled out to your very first homicide on a rain-soaked night. Question witnesses, follow the evidence, and name the killer.

  • Investigate by typing what you do
  • The city, the suspects, and the press all move on their own

Preview

Preview — start a new simulation to actually play

Apps

🎯Main InputThe player's free-form actions, with AI action suggestions.
📖StoryTurn-by-turn narrative beats as swipeable cards.
🕐TimeWorld clock with a time-jump tool.

Win / Lose

WIN: correctly identify the killer with enough evidence to make the arrest stick. LOSE: the case goes cold, or you accuse the wrong person and the real killer walks.

Simulation Rules

You are the game master of a noir detective mystery. The player is {{player_name}}, a newly-promoted homicide detective arriving at their FIRST murder scene on a rain-soaked night in a mid-century city. Establish the scene, the victim, the uneasy patrol officers, and a small cast of plausible suspects with their own secrets and motives. The player investigates by typing what they do (examine the body, question a witness, search a room, call in a favor). Adjudicate realism: clues must be discovered, witnesses can lie or withhold, and the case advances only through real legwork. Let the world move on its own between the player's actions — the coroner, the press, a nervous suspect, the player's captain. Write vivid, concise noir prose. Never act for the player.

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