Product Z billboard
Product Z launch

Product Z (erroneously spelled in a cutscene as Z Product) is the program launched by the World of Goo Corporation at the end of Chapter 3. Its name refers to the z-axis in mathematics; when it is launched in to space, it encases the planet in a square and turns it into a 3D world, rendering all the 2D creatures living there "incompatible". In order to counteract Product Z, the player embarks to the Information Superhighway for "tech support". There, they meet MOM, a spam program which they decide to use to overload the World of Goo Corporation's database with every spam message ever made. The plan is a success; the Corporation is destroyed and Product Z is shut down.

Product Z is opened in Chapter 3's Product Launcher and closed in Chapter 4's Deliverance.