The most enduring legacy of UMS is the Tower Defense genre. The progenitor was
Unlike standard melee matches, UMS maps ignored the traditional rules of mineral mining and base building. Mapmakers used "triggers"—a rudimentary but flexible scripting system—to create entirely new genres. This environment birthed concepts that are now multi-billion dollar industries: brood war ums maps
This is a comprehensive guide to maps—the custom game scene that defined a generation of StarCraft. The most enduring legacy of UMS is the Tower Defense genre