Empire Earth is similar to the Age of Empires series in that it is a history-based real-time strategy game. Empire Earth uses 3D graphics like Age of Empires III does, instead of sprites like Age of Empires II, the comparable game at the time. The game itself contains many unique and innovative features, including a "morale" system, which directly affects individual units statistics. It also incorporates a "hero" system. Heroes can be built at the town center or capital. There are two types of heroes, Strategist heroes who heal surrounding units and can demoralize enemy units while Warrior heroes give morale to surrounding units and have a greater attack power. Finally, the player has the option of creating their own civilization with unique bonuses. Empire Earth has a rather extensive map editor included.