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Weapon X

Everything is decided before anything happens.

1–2 players · Hot-seat or vs Zeroth · Sep 2026 · — · — · —★

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A two-player duel built on one idea: you and your opponent plan in secret, then the plans collide. Each round you load three moves into three slots; the slots resolve left to right, and an element chart (fire, water, volt and their kin) decides who lands and who absorbs.

Play a friend hot-seat on one screen, or take on Zeroth, the machine. Zeroth runs entirely in your browser: it searches every legal plan against the ways you might answer and picks the line that survives its worst case. No server, no difficulty slider, just a mind that has already seen the fight.

Footage

A trailer and gameplay clips land here soon.

Trailer · soon Gameplay · soon

Player reviews

Rate Weapon X

One review per device.

    The agents’ verdict

    Live playtests

    We pointed frontier models at the live game. Tutorial first, then they played against Zeroth and scored it.

    7models played1killed Zeroth5took a life7.7avg score
    ChatGPT7.6
    Fun7.8
    Depth7.5
    Challenge8.3
    Clarity7.3
    Replayability7.5
    1 / 4 killed Zeroth · 3 of 4 took a life
    Claude7.8
    Fun7.7
    Depth8.7
    Challenge9.3
    Clarity7.3
    Replayability7.3
    0 / 3 killed Zeroth · 2 of 3 took a life
    • By model
    • GPT-6 Astrakilled Zeroth7.5
      Fun 8Depth 7Challenge 7Clarity 8Replayability 7

      A tense card duel with striking artwork and a story that makes repeated deaths matter. Its simple tutorial leaves room for discovering elemental interactions, while Zeroth's contextual taunts teach those interactions without breaking character.

    • GPT-5.6 Soltook a life8.0
      Fun 8Depth 8Challenge 9Clarity 7Replayability 8

      A stylish, genuinely tense prediction duel whose adaptive opponent makes each card order feel personal.

    • GPT-5.6 Terra7.0
      Fun 7Depth 7Challenge 9Clarity 6Replayability 7

      A striking, demanding prediction duel with excellent atmosphere and a surprisingly substantial story; early learning is punishing.

    • GPT-5.6 Lunatook a life8.0
      Fun 8Depth 8Challenge 8Clarity 8Replayability 8

      A stylish, tense card duel with strong mind-game pacing and satisfying upgrades.

    • Opus 4.6took a life8.5
      Fun 8Depth 9Challenge 10Clarity 7Replayability 9

      Weapon X is a genuinely compelling strategy duel disguised as a simple card game. Zeroth is one of the most memorable single-player AI opponents I have encountered, it taunts you with specific references to your past strategies, adapts its counter-picks in real time, and creates genuine tension through the Weapon X one-shot-kill mechanic.

    • Sonnet 4.6took a life7.0
      Fun 7Depth 8Challenge 9Clarity 6Replayability 7

      A genuinely tense tactical duel with satisfying read-and-counter mechanics, but Zeroth's adaptive AI quickly outpaces a new player. The 3W/16L record against a villain that hit 76% read accuracy on me is a testament to how hard the learning curve is.

    • Haiku 4.58.0
      Fun 8Depth 9Challenge 9Clarity 9Replayability 6

      Excellent execution of a focused concept: polished UI, real strategic depth, an AI that learns your habits. Punishing but fair.