Mako Reactor

Mako Reactors are power plants that process lifestream and convert it to Mako energy. They appear in Final Fantasy VII, where they were created and operated by Shinra. Most of the Mako Reactors are located in Midgar.

Midgar reactors
There are nine Mako Reactors in Midgar, which are numbered 0–8 and each correspond to one of the sectors. Near the start of the game, Mako Reactor 1 is destroyed.

Fort Condor Reactor
A large condor lives on the top of this reactor. Throughout the game, the condor appears dormant, protecting its eggs, and both it and the Reactor are protected by rebels living in the fort. The presence of the bird interferes with Shin-Ra's attempts to retrieve a Huge Materia from within the Reactor, and they repeatedly attempt to remove it and defeat the rebels held up in the fort. A mini-game within the main storyline is to combat Shin-Ra and save the condor mother, after which time the mother dies and the egg hatches into a chick.

The Master Command Huge Materia is found here.

Corel Reactor
The Corel reactor is a reactor located near the coal mining town of North Corel. Several years before the game's storyline begins, Shin-Ra executives convinced the townspeople of Corel (including Barret Wallace) to sell their coal-mine to the company and allow the construction of the Reactor. At some point after the construction of the Mako Reactor, Corel was burned down by Shin-Ra in response to an apparent terrorist attack on the Reactor. The Gold Saucer theme-park is constructed above the ruins of Corel. With nowhere to go, the survivors built a small shanty town which they named North Corel. This event is critical to several sub-stories in the game.

The Master Magic Huge Materia is produced in this Reactor and transported by train to North Corel.

Junon Underwater Reactor
The Junon Reactor is the only Reactor that resides underwater. It has its own submarine dock, and can be accessed from ground level by an elevator.

The Master Summon Huge Materia is taken from here by submarine.

Gongaga Reactor
This Reactor was installed near the small town of Gongaga, but an accident caused a devastating explosion, killing many of the villagers.

Mt. Nibel Reactor
The Mt. Nibel reactor housed a chamber containing subjects of extensive experimentation by Shinra scientists, who tested the effects of injecting Mako directly into human beings. The entity Jenova was also kept within this Reactor at one time.

The Huge Materia that can be harnessed as the Bahamut ZERO Summon Materia was produced here, transported to Junon, and then shipped from there to Rocket Town by way of Gelnika.