Red Goo is a species of Goo in the video game World of Goo. Resembling matchsticks, these Goo behave like Black Goo, except they will burst into fire and pop after a few seconds if touched by flame. They can spread fire to other Goo Balls too, as fire will travel along their legs. This is first demonstrated when are are first encountered in the level Burning Man. They are only found in Chapter 3, but are used often in that chapter.
Like Black Goo, they can be used to construct structures