Reactor 0

Mako Reactor 0

Seen only in Dirge Of Cerberus, which is located under the ground of Midgar. Which is probably used to power the buildings for deepground and maybe for the shinra building. It is used by deepground to create Omega which they thought they would use to conquer the world. But Nero had other plans and had Omega created inside of Weiss because professer Hojo "killed" him but was acutally unconsses until Omega was created inside of wiess which they used people that didn't have geostigma and droped them inside the mako reactor to make Omega think that the end of the world was coming