404 challenge is a release file of the Minecraft map err_404, made for Minecraft 1.21.8, 1.21.9, 1.21.10, 1.21.11. It was published on August 16, 2025 and is 22.3 MB in size. For the full description, screenshots and every other version, visit the err_404 map page.
How to install: Extract the .zip and move the world folder into .minecraft/saves; the map then appears in your Singleplayer list.
