MegacraftClassicRelease1.6MusicFree.zip is a release file of the Minecraft resource pack Megacraft Classic - Be the Block Bomber!, made for Minecraft 1.6.4. It was published on February 6, 2014 and is 3 MB in size. For the full description, screenshots and every other version, visit the Megacraft Classic - Be the Block Bomber! resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.
