Optional Sound Pack is a beta file of the Minecraft resource pack Falloutcraft, made for Minecraft 1.16.1, 1.14.4, 1.15.2, 1.13.2. It was published on July 18, 2020 and is 221 MB in size. Pre-release builds can contain bugs — back up your world before installing. For the full description, screenshots and every other version, visit the Falloutcraft resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.
