The Worldbuilder is the official map editor for Red Alert 3. Like its predecessors, maps were created in an in-engine environment, allowing full control over the landscape. It is incompatible with versions 1.04 and below of Red Alert 3, as well as Uprising. A special, more potent version of the Worldbuilder was made specifically for version 1.12 and was released separately from the Mod SDK. Using both Worldbuilders at the same time is possible.