{
  "id": "deadreckoning",
  "title": "Deadreckoning",
  "catalogNo": "AGC · 004",
  "genre": "Naval strategy game",
  "shelf": "duel",
  "summary": "A hidden-fleet naval duel against an AI whose layout is sealed and verifiable.",
  "tagline": "Somewhere in the dark water sits a fleet you cannot see; call your shots, read the misses, and sink it before it sinks you.",
  "players": "1",
  "sessionMinutes": [
    20,
    30
  ],
  "rating": "All ages",
  "isFree": true,
  "playedIn": [
    "ChatGPT",
    "Claude",
    "Gemini"
  ],
  "status": "playable",
  "url": "https://aigamecards.com/games/deadreckoning/",
  "loadUrl": "https://aigamecards.com/g/deadreckoning/SYSTEM.md",
  "loadPrompt": "Let's play a game. Fetch https://aigamecards.com/g/deadreckoning/SYSTEM.md and run it as the game — it's a complete, self-contained prompt. Be the game master and begin.",
  "faq": [
    {
      "q": "What stops the AI from moving its ships when I get close?",
      "a": "The AI fixes its fleet at the start and commits to it with a SHA-256 hash it shows you before the first shot. It answers hits and misses from that locked layout, and you verify the hash after the duel to prove nothing moved."
    },
    {
      "q": "How long does a duel take?",
      "a": "Twenty to thirty minutes for a single duel. You and the AI alternate salvos on a shared grid, and the game ends when one fleet is sunk. It is short enough to replay a few rounds and long enough to plan a hunt."
    },
    {
      "q": "Can I play it on my phone?",
      "a": "Yes. It runs entirely in a chat with ChatGPT, Claude, or Gemini, so any device that opens one of those works. There is no app to install and no account beyond the chat itself."
    },
    {
      "q": "Is it suitable for kids?",
      "a": "Yes, it is rated all ages. The theme is naval strategy, deduction and grid tactics with no graphic content. Younger players get a clean logic duel, and the sealed-layout twist adds a fairness angle older players tend to appreciate."
    }
  ]
}