Flight over endless procedural mountains
A simulator game CyrilXBT built with Claude Opus 5.5. Copy the exact prompt free.
@cyrilXBT built this with Claude Opus 5.5 and shared the one-shot prompt on X; it is quoted below word for word. i asked opus 5.5 to build a flight simulator over procedural mountains in one html file 321 lines. one prompt. one bug fixed by hand. nothing in this world was modeled. every peak, lake and tree is generated from noise as you fly, so it never runs out bank left and dive toward the snow line. the mountains keep building in front of you follow @cyrilXBT The original post had 13.9K views.
The prompt
build a flight simulator over procedural mountains in one html file
Prompt by CyrilXBT (@cyrilXBT), quoted word for word from the original post. Model as stated by the creator; your result will differ.
What’s inside
- Copy the prompt below, or download it as a SKILL.md
- Paste it into Claude Opus 5.5, ideally in Claude Code so it can write, run and test the game
- Swap in your own theme, characters or rules where the prompt names theirs
- 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 · simulator · flight over endless procedural mountains
Questions
What is Flight over endless procedural mountains?
Flight over endless procedural mountains is a simulator game that CyrilXBT (@cyrilXBT) 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?
CyrilXBT (@cyrilXBT) made it and shared the prompt on X: https://x.com/cyrilXBT/status/2103801828744061307. You can find more from them at https://x.com/cyrilXBT.
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 CyrilXBT. 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.