Released in 2023, this Real-Time Strategy (RTS) expansion integrates content from the original Age of Empires into Age of Empires II: Definitive Edition. You build empires and engage in historical conflicts across three new campaigns, featuring the original sixteen civilizations plus the new Lac Viet civilization, and introducing the Romans as a playable faction within the core game. It supports single-player, multiplayer, and co-op modes.