SigmaStage1.zip is a release file of the Minecraft map Megaman Maverick Hunter X Sigma Stage 1, made for Minecraft 1.8.1. It was published on February 8, 2015 and is 0.6 MB in size. For the full description, screenshots and every other version, visit the Megaman Maverick Hunter X Sigma Stage 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.