Eurasia

Eurasia (ユーラシア) is a space colony that played a very important role in Mega Man X5, and is also referenced in Mega Man X6 and Mega Man Zero 4.

History
In Mega Man X5, Sigma ordered Dynamo to spread a virus in the colony and make it crash on Earth, and the Maverick Hunters have 16 hours to destroy the colony before it crashes, using the time to obtain parts to enhance the power of the only weapon available, an old cannon called Enigma. Depending of the game events, the colony can be destroyed before entering Earth, either with the Enigma or a space shuttle piloted by Zero, or crash and cause widespread destruction, in both ways making the virus inside the colony merge with the Sigma Virus, and Zero may become a Maverick.

Despite Eurasia's destruction, the debris still hits the Earth, causing enough damage to force humans to live underground due the rampant pollution. In Mega Man X6, Gate explored the remains of the colony at its crash site and found of a fragment of Zero, and one week later became a Maverick as the debris was infected by the virus. Eurasia's remains can be seen in from distance in the first stage and in the entrance of Gate's Lab.

In Mega Man Zero 4, it's revealed Area Zero is the location where Eurasia had crashed. The area had been sealed off since the crash of the space colony, but the land had been renewed and nature was becoming more abundant.

Trivia

 * The name Eurasia comes from the large landmass that comprises the continents Europe and Asia, and is a portmanteau of the two.