Age of Empires II browser clone

A strategy game Barty-Bart built with Claude Opus 5.5. Copy the exact prompt free.

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by Barty-BartFreeOpus 5.5 game prompts

Barty-Bart built this with Claude Opus 5.5 and shared the full prompt on GitHub; it is quoted below word for word. Play the six browser strategy games from the video, inspect their source, and copy the prompts used to generate them. Same prompt run at five effort levels.

The prompt

Build a complete, polished, playable browser clone of Age of Empires II. Capture the experience of growing a medieval settlement, developing its economy, advancing through ages, building an army and defeating a computer-controlled rival. Make the implementation decisions yourself. Prioritize an enjoyable game, strong visual presentation and systems that work together. Test it yourself before finishing, and leave it running so I can play it.

Prompt by Barty-Bart, quoted word for word from their GitHub repository. Model as stated by the creator; your result will differ.

What’s inside

  1. Copy the prompt below, or download it as a SKILL.md
  2. Paste it into Claude Opus 5.5, ideally in Claude Code so it can write, run and test the game
  3. Swap in your own theme, characters or rules where the prompt names theirs
  4. Play it, then ask for fixes and polish in plain words

What you’ll bring

  • Claude Opus 5.5 (Claude Code, or a Claude chat for single-file HTML games)
  • A browser to play the result
  • Your own twist on the idea, if you want one

What you’ll get

  • A playable browser game in the spirit of the one above, written by Claude
  • The code, which you can keep editing

Perfect for

  • Anyone who wants to make a game without coding
  • Developers testing what Opus 5.5 can build
  • Teachers and parents making a game with kids

Also found as

opus 5.5 game prompt · claude game prompt · one shot game prompt · strategy · age of empires ii browser clone

Questions

What is Age of Empires II browser clone?

Age of Empires II browser clone is a strategy game that Barty-Bart built with Claude Opus 5.5. This page quotes the prompt they shared, word for word.

Who made it, and where was the prompt shared?

Barty-Bart made it and shared the prompt on GitHub: https://github.com/Barty-Bart/opus-55-effort-comparison/blob/main/prompts/original.txt. You can find more from them at https://github.com/Barty-Bart/opus-55-effort-comparison.

How do I use the prompt?

1. Copy the prompt below, or download it as a SKILL.md. 2. Paste it into Claude Opus 5.5, ideally in Claude Code so it can write, run and test the game. 3. Swap in your own theme, characters or rules where the prompt names theirs. 4. Play it, then ask for fixes and polish in plain words.

Is it free?

Yes. Copying the prompt and downloading the SKILL.md costs nothing on Omo. You run it with your own access to Claude Opus 5.5.

The video and the prompt belong to Barty-Bart. Omo lists them free, with credit and a link to the original post. Creators can ask us to remove a listing at omo.space/support.