Mega Man X4

Six months following the inception of the group, Cain Labs finds its methods to be ineffective, questionable, and potentially dangerous in the Maverick defense. To make matters worse, behind the scenes, General has been meeting with a mysterious figure who plots the Hunters' demise, insinuating that they are a significant threat to the jurisdiction of the Maverick Hunters. Mayhem breaks out when the Sky Lagoon, a massive floating city, is sent crashing down onto the city below it, killing millions of civilians, humans and Reploids alike. The game begins here where either X or Zero is dispatched to investigate possible causes of the disaster only to become entangled, once again, in a struggle against Sigma to save the world.