Worldbuilder (Generals) was a mapping and modding tool for Command & Conquer: Generals and its expansion pack. It starts off with a loading screen and after that, the screen changes to a large square which is the battlefield. On the other side of this is the identification page where you must situate your name and things to put with during your Worldbuilder construction. On top of the battleground is your worldbuilder pieces where you must use different types of stuff you can use for your project. For the map, you can shade in a terrain of your choice as you put some hills or rivers in it before you can make up either a Civilian, USA, China or GLA structure and its forces to be put in with your project. In Zero Hour, it's still the same thing but with new bits and pieces for you to do.