.GOOMOD File Extension

Add-on file used by GooTool, a program that installs addons for the puzzle game World of Goo; may be either a mod, which can replace any game file, or a level, which adds a new playable level and an in-game menu option for selecting the level.

GOOMOD files are saved in a .ZIP format and can be decompressed with any Zip decompressor.