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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.
  1. Pick an example or write your game idea.
  2. Choose engine/language/platform and complexity.
  3. Click Generate Prompt.
  4. Optionally click Enhance (AI) to add more implementation details.
  5. Copy Prompt and paste into your coding assistant.
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.

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