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Square Enix Dev Shows Game Designers How to Prototype With AI

At CEDEC2026, Square Enix's Tsukasa Toya demonstrated a workflow for non-engineer game designers to build prototypes using generative AI.

Reporting from 1 source: Game Spark.

Why it matters

The session suggests a flexible, phase-by-phase AI production method as a practical alternative to vibe coding for game designers without engineering backgrounds, aimed at improving planning presentations and team communication.

Square Enix Dev Shows Game Designers How to Prototype With AI

The session used Unity 6 and a production method that generates assets and code at each phase rather than relying on complete AI-generated code. Toya, using the engine for the first time, created an action game where a knight fights enemies with a sword.

Square Enix's Tsukasa Toya presented a CEDEC2026 session aimed at producers and game designers without engineering backgrounds who want to create their own prototypes. The stated benefits include stronger planning presentations, easier team image-sharing, and livelier communication.

For the demonstration, Toya chose Unity 6 because it runs on a notebook PC and because he was using it for the first time, which he argued suited a demonstration aimed at beginners. Instead of directing an AI to produce a finished game, the approach generated assets and code at each stage and integrated them into the engine. The result was a playable action game with a knight advancing and defeating enemies with a sword.

Written with AI by Yomimono from the 1 cited source below, including Japanese-language reporting where cited. See our editorial policy.

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