In January 2021, Age of Empires II: Definitive Edition released yet another expansion, "Lords of the West", adding the Sicilians and Burgundians.

The Conquerors introduced various new gameplay features and tweaks, including the new game modes Defend the Wonder, King of the Hill and Wonder Race.

Additional maps, some based on real-life geographic locations, and new winter and tropical terrain textures were also included.

Additionally, a button has been added to the mill, which allows farms to be paid for in advance, so that when an existing one is exhausted, it will automatically be replanted without requiring manual input from the player.

These are based on Attila the Hun's rise to power, Montezuma's defense against Hernán Cortés, and the adventures of El Cid.

A hidden scenario is also available on the game disc: the Saxon Revolt (original German title: Anno 782 - Sachsenaufstand).

Attila then launches a series of raids on various cities (Naissus, Sofia, Dyrrhachium, Thessalonica, and Adrianople), in order to obtain resources to destroy a base in the Eastern Roman Empire.

These raids take him to Marcianopolis, Philippopolis, and Constantinople, continuing even as the Romans attempt to buy him off with payments of gold.

He then receives a whimsical marriage proposal from Honoria, prompting him to concentrate his raids in Gaul, defeating Burgundy, Metz, and Orléans before withstanding the onslaught of a Roman army.

He returns to King Alfonso's service to defend him from the attacks of Yusuf and his Black Guard, destroying all of their docks.

Alfonso exiles him yet again, and El Cid wanders through the cities of Denia and Lérida until finally arriving in Valencia, which he defends from the attacks of Berenguer as the Valencians construct a Wonder.

He is killed by a stray arrow in a failed raid, and his wife Ximena de Asturias puts his corpse on horseback to give the impression that he is still alive, so that his soldiers will not lose heart as they defeat Yusuf's forces.

The Spanish then arrive on the shores of the New World in search of gold, and Hernán Cortés destroys his transports to indicate his resolve to make good his claim on the Aztec Empire in the name of the King of Spain.

Vindlandsaga shows Erik the Red's expedition to Newfoundland, showcasing raids on the British coastline, the subjugation of Greenland, and the fending off of Skræling in the New World as the Vikings found a settlement.

The Battle of Agincourt in 1415 shows Henry V asserting his claim to the throne of France as he retreats from Harfleur and then travels through Voyeni, Amiens, and Frévent before facing the French knights with his longbowmen and sailing back to England.

The Battle of Lepanto in 1571 shows John of Austria's forces keeping Turkish ships and transports at bay as they defend a Wonder constructed quite close to the shoreline.

The Age of Empires Collector Edition Soundtrack CD's tracklist gives many of the names of the individual tracks.