world_1.3_alpha.zip is a release file of the Minecraft map survival world, made for Minecraft 1.7.4. It was published on December 27, 2013 and is 18 MB in size. For the full description, screenshots and every other version, visit the survival world map page.
How to install: Extract the .zip and move the world folder into .minecraft/saves; the map then appears in your Singleplayer list.
