Autumnal Mountains is a release file of the Minecraft map Assassin's Better MC: Autumnal Mountains, made for Minecraft 1.12.2. It was published on November 11, 2020 and is 17 MB in size. For the full description, screenshots and every other version, visit the Assassin's Better MC: Autumnal Mountains map page.
How to install: Extract the .zip and move the world folder into .minecraft/saves; the map then appears in your Singleplayer list.
