Spider_Chase_1.4.7_.zip is a release file of the Minecraft map Spider Chase - Run for your life! (V1.1), made for Minecraft 1.4.7. It was published on March 10, 2013 and is 0.8 MB in size. For the full description, screenshots and every other version, visit the Spider Chase - Run for your life! (V1.1) map page.
How to install: Extract the .zip and move the world folder into .minecraft/saves; the map then appears in your Singleplayer list.