The Forgotten brings five new civilizations to the second part of Age of Empires: Italians, Indians, Slavs, Hungarians and Incas. It also adds four new campaigns to the strategy, the main characters of which are the leader Alarich, the captain of the mercenaries of Sforza and the Valash Prince Dracula. Another set of plot missions is dedicated to the Byzantine family, which is gaining power in the port city of Bari. In addition, three new modes and the possibility of organizing broadcasts on Twitch appeared in the game.TV.
Note that DLC The Forgotten was originally developed as an unofficial modification. However, over time, she attracted the attention of Microsoft Studios, which made it possible to release the mod as an official addition to Age of Empires 2.