---
name: opus-5-5-game-blockhaven-webgl2-minecraft-style-survival
description: "Use when you want a game like @kepochnik's \"BlockHaven: WebGL2 Minecraft-style survival\". Runs their exact Claude Opus 5.5 prompt."
source: https://x.com/kepochnik/status/2103502454750920925
prompt_source: https://x.com/kepochnik/status/2103502454750920925
author: "kepo (@kepochnik)"
model: claude-opus-5-5
---

# BlockHaven: WebGL2 Minecraft-style survival

A free prompt from the Omo "Opus 5.5 game prompts" collection.

- Made by kepo (@kepochnik) and shared on X: https://x.com/kepochnik/status/2103502454750920925
- Prompt quoted word for word from: https://x.com/kepochnik/status/2103502454750920925
- Model as stated by the creator: Claude Opus 5.5. Omo has not re-run it, so your result will differ.

## How to use

1. Open Claude Code (or a Claude chat for a single-file HTML game) running Claude Opus 5.5.
2. Paste the prompt below.
3. Change the theme, characters or rules if you want your own version.
4. Play it, then ask for fixes in plain words.

## Prompt

```text
Build a browser sandbox game in the spirit of Minecraft that feels as close to the original as possible. All in-game text in English. Controls: keyboard and mouse (desktop).  TECH - A single HTML file, plain WebGL2, no third-party libraries. - All 16×16 textures generated in code as pixel art (stone, dirt, grass, planks, leaves, ores, glass, water, lava, etc.). - Sounds synthesized with WebAudio: digging, footsteps, placing blocks, damage, mobs, explosions, calm background music.  WORLD - Infinite world made of 16×16×128 chunks, with a seed. - Biomes: plains, forest, birch forest, taiga, snowy tundra, desert, mountains, oceans, beaches. - Caves (winding tunnels and large caverns), lava at the lower levels, ores by depth: coal, iron, gold, diamonds. - Three tree types, tall grass, flowers, cacti, sugar cane, pumpkins. - Minecraft-style lighting: sky light and block light (torches, glowstone, lava) that spreads cell by cell, with smooth lighting and ambient occlusion. - Day/night cycle: sun, moon, stars, sunsets, 3D clouds, distance fog, rain. - Water and lava flow by levels; two sources make infinite water; water + lava make obsidian or cobblestone. Sand and gravel fall.  PLAYER - First person, collisions, jumping, sprinting, sneaking (doesn't fall off edges), swimming, ladders, fall damage. - Block breaking with crack stages and particles; break time depends on the tool. - Visible hand and held item with a swing animation. Third-person view on F5.  SURVIVAL - Health, hunger, saturation, air underwater. - Tools in 5 materials with durability, armor in 4 materials. - Inventory with 2×2 crafting, 3×3 crafting table, furnace with fuel, chests, bed (skip the night and set spawn). - Item drops, death and respawn. - Mobs: pigs, cows, sheep, chickens (breeding, shearing); at night zombies, skeletons with bows, spiders. Zombies and skeletons burn in sunlight. - Farming: hoe, seeds, wheat growth, bread. Doors, fences, fence gates, TNT.  CREATIVE - Flying on double-tap Space, instant block breaking, a catalog of all blocks with tabs and search.  UI - Title screen with a world panorama, world list (create / delete / play), options (FOV, render distance, sensitivity, sound, brightness, GUI scale). - Pause menu, death screen, HUD (hotbar, hearts, hunger, armor, air bubbles), F3 debug screen. - Chat with commands: /gamemode, /time, /give, /tp, /summon, /weather. - Worlds saved in localStorage.  RESTRICTIONS - Do not use Minecraft's name, logo, textures or characters (Steve, Creeper, etc.): give the game its own name and design your own mobs.  TESTING - Run the game in a headless browser, check every system and fix bugs before delivering.
```

---
The prompt and the game belong to their creator. Listed on omo.space with credit and a link to the original.
Creator and want it removed? https://omo.space/support