"Warcraft: Orcs & Humans is a real time strategy game (RTS), that is, the contenders play at the same time and continuously, so that players have to move quickly. One player represents the Human habitants of Azeroth, and the other controls the invading Orcs. Each side tries to destroy the other by collecting resources and creating an army. In addition both sides have to ward off dangers from wild monsters, but sometimes can use some monsters as troops. The game plays in a medieval setting with fantasy elements. Both sides have melee units and ranged units, and also spellcasters."
Source: Wikipedia, "Warcraft:_Orcs_and_Humans," available under the CC-BY-SA License.