Overrun! offers meticulous simulation of late twentieth-century squad-level action in European and Middle Eastern terrain. Players command a battalion of infantry, armor, artillery, and helicopters on behalf of Arab states, Iran, Israel, NATO, and the Warsaw Pact. The bulk of scenarios are speculative and near-future (including an Iranian invasion of Kuwait), but one historic war is presented, the 1973 Arab-Israeli "October War." A single-player campaign of randomly generated maps starts you with a core force which you will hopefully retain and expand with each victory.