Earth

Earth (Mega Man X)
Earth is a futuristic world where humans coexist with their Reploid protectors. Reploids are advanced Androids that are essentially living beings on their own. They eat, breathe, sleep, and bleed just like humans, but do not grow (except in knowledge) and are ageless. The major location on this world is the Maverick Hunter HQ, which is the head of the organization devoted to researching the darkness spreading across the worlds to stop it from doing any more damage. This organization is headed by the reploid Captain. The main party are lead to the different worlds with the help of their operator, Esther. The one in charge of repairs of the damaged Reploids is Professor Doxamyrn. There are a plethora of different climates on their world, ranging fron tundra to desert to rain forest and everything in between.

Heartless on Earth
The heartless on Earth tend to have a robotic look to them, having clunky metal exteriors. The Maverick Hunters have little trouble destroying the Heartless, but they always come back some way later. Occasionally one of their own numbers, a fellow reploid, will fall into darkness and become a Heartless. They are then known as a Maverick and much be eliminated at all costs, lest they spread the virus to others.