Build game prompts that ship real projects.

PromGen

Generate structured prompts for AI coding assistants to build complete game projects.

Step-by-step

Guided inputs for better clarity.

Browser AI

Checking availabilitychecking

Ready to paste

Copy into ChatGPT, Claude, or Cursor.

If the model is downloadable, this will start the on-device download.

Prompt inputs

Describe the game you want to build

Fill the form and generate a structured prompt that an AI coding tool can follow.

Examples

Game Idea

Game Genre

Game Engine / Framework

Programming Language

Target Platform

Game Complexity

Visual Style

How to use PromGen

Generate a prompt first, then optionally enhance it with Browser AI if available.

Prompt workflow

Fast steps to produce a paste-ready spec.

Browser AI troubleshooting

What the status means and how to enable it.

unavailable: device/OS/disk/hardware doesn’t meet requirements, or the API isn’t exposed.
downloadable: model download is needed; click Load Browser AI.
downloading: wait for the download to finish.
available: AI buttons should work.

Quick checklist (Chrome)

Desktop only (Gemini Nano is not available on mobile).
macOS 13+ / Windows 10+ / Linux (desktop).
At least 22 GB free on the Chrome profile disk.
Either GPU > 4 GB VRAM, or 16 GB RAM + 4 CPU cores.
Enable flags: chrome://flags/#optimization-guide-on-device-model and chrome://flags/#prompt-api-for-gemini-nano, then relaunch.

Debug tip (DevTools Console)

await LanguageModel.availability()

Check download status at chrome://on-device-internals.