Before you use it
The star count is for the whole openai/plugins repo. MIT is declared in the plugin's manifest; the repo has no top-level LICENSE file.
Why it's useful
Nine skills cover 2D games in Phaser, 3D in three.js or React Three Fiber, game UI, sprite and 3D asset pipelines, and a playtest skill that boots the game, plays the core loop, takes screenshots and reports bugs worst first with steps to reproduce them.
What it needs
Codex (ChatGPT plan or OpenAI API key). The SKILL.md files also work in Claude Code and other agents if you copy them in. Playtesting needs Playwright and a browser.
Image: OpenAI. Game Studio plugin for Codex belongs to OpenAI; we just think it's worth knowing about.
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