Mako Reactor 1 or the Sector 1 Reactor is one of the eight Mako Reactors built by the Shinra Electric Power Company to power the city of Midgar, appropriately found in Sector 1, in Final Fantasy VII. Its layout is the same as the Sector 5 Reactor. The Sector 1 Reactor is the northernmost reactor in Midgar, and is even referred to as the "Northern Reactor". The station located outside the reactor grounds is called North Edge Station.


Spoiler warning: Plot and/or ending details follow. (Skip section)

Barret and Cloud in the Sector 1 Reactor Core.

The eco-terrorist group AVALANCHE, in an attempt to save the Planet from the corrupting ways of Shinra, attacks the reactor. The effort is led by Barret Wallace who is accompanied by Biggs, Wedge, Jessie, and the recently hired mercenary Cloud Strife. The team captures a train and uses it to break into the reactor grounds, which are defended by Shinra guards.

The team fights its way down into the main generator, and prepares to put the charges in. Cloud has a brief flashback to the incident in Nibelheim and suffers a psychic disturbance. Before the charges can be pulled, the robot Guard Scorpion attacks, and is defeated by Cloud and Barret before they and the rest to AVALANCHE make their way back out before the reactor explodes.

The destruction of the Sector 1 Reactor.

The explosion causes massive destruction with unknown numbers of civilian casualties. Cloud and AVALANCHE scatter to regroup at the train heading for the Sector 7 slums. The reactor remains closed, and when Shinra places the Sister Ray cannon within Midgar, seven reactors charge up its blast, Sector 1 Reactor still out of commission.

Spoilers end here.



Map of the outside area of the Sector 1 Reactor

Mako Reactor 1 is an unrevisitable location visited at the start of Final Fantasy VII during a mission to destroy the reactor. The area just outside the reactor that is visited includes the platform, a train station reached by a set of stairs, a walled-off area just north of the station, and a walkway connecting Sector 1 and Sector 8 entered in the walled-off area. The Utility Access is reached through a walkway connecting Sector 1 and Sector 8. After entering, it is a set of rooms filled with machinery leading to an elevator, which travels down to a series of vast rooms and piping. Ladders can be traversed to eventually lead down to the core of the reactor. The interior of the Sector 1 Reactor has a brown-ish tint, in contrast to the Sector 5 Reactor with a similar layout.


Train station.png

The Platform is the first area in the game and visited as soon as the opening movie finishes. The area comprises a stone platform alongside the railway track, with metal gates on the lefthand side, and the sign "1-0b" painted on the wall. At the fair end of the platform on the left is the exit onto the North Edge Station.

North Edge Station

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The Sector 1 Station area, also known as the North Edge Station, is entered from the Platform through a staircase beneath it. Here, the player exits a door and heads north to join with the members of AVALANCHE. The station is a wide, stone building with a gale roof and four turbines on each corner. It is situated atop a stone wall overlooking the railway, and adjacent to the wall surrounding the Sector 1 plate. In the surrounding area is a path north towards a stone wall in front of the Sector 1 area, where the mission continues.

Reactor Grounds

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The Reactor Grounds, incorrectly referred to as "Sector 1" in the original game, is a walled-off area reached from station. It comprises a few small metal buildings across a stone floor alongside the wall surrounding the compound. Within the area are metal pipes, metal framing around the buildings, and dim street lamps. Above some metal framing is a screen, showing the words "INTRUDER", "WARNING", and four Kanji characters. In the center of the area is a narrow building resembling a bunker at its front with a large clock tower at its top.

The Sector 1 area leads to the walkway outside the Sector 1 Reactor, with a walled-off door to the walkway at the very back of the area. The path to this door is found to the right of the central building, after passing it is a path left straight to the door.

Outside reactor


The walkway outside the reactor, known as "No.1 Reactor" in the menu of the original game, is used to access the Sector 1 Reactor, and to escape. It comprises a metal walkway connecting Sector 1 and Sector 8, and a path in the middle leading directly to the Sector 1 Reactor. The walkway is suspended above a vast abyss over the lower area of the city.



The interior is a metallic, brown-ish area full of large pipes, rusting doors, and machinery. It is a set of joined rooms with terminals, and the doors between the room are locked until their codes are deciphered. At the northeast-most location, an elevator leads down to the lower areas of the reactor.

The elevator connects the entrance with the main staircase. It is a dimly-lit enclosed space with a purple tint, and has a valve and flashing lights on the wall at the back, while the elevator door is located on the left.

Utility Access

Main staircase

Main staircase.

The main staircase is a large, expansive room, with a red tint on the stairways, dark brick walls, and metallic pipes, accessed by the elevator.

The elevator opens atop a large structure within the room, with a staircase used to descend this structure to the floor of the room, where a door leads to the upper piping. The structure also contains a small, round tower atop it that can be climbed using ladders, though it contains nothing of interest.

In contrast to the main staircase of the Sector 5 Reactor, the Sector 1 Reactor has no pipe leading down from the door in the back-end of the room, which is instead unreachable.


Upper piping (top) and lower piping (bottom).

The upper piping is a damaged area full of rusting metallic pipes. It is reached through a door at the bottom of the main staircase room, which opens to a damaged stone wall. At the end of this stone wall, a ladder across a huge pipe leads down to a set of beams suspended above the core's main room. To the right of the beams is a set of steps leading down to a pipe below them. At the end of this pipe is a tall ladder leading down to the lower piping.

The lower piping comprises large pipes suspended above the walkway leading to the core. It is reached using a ladder down from the upper piping, and themselves lead to another ladder down to the walkway by the core.



The core is where Cloud and Barret fight the Guard Scorpion and set the bomb. The core itself is surrounded by metallic pipes and heavy machinery, with a single narrow walkway leading towards it. The walkway contains a save point, and an inaccessible door. On the end of the walkway is the core itself, which is a large, tubular structure built into a wall, with "1998" written at the top, and a set of pipes leading to a valve at the bottom.


Final Fantasy VII


Battle backgrounds for areas outside (top) and for the walkway just outside the Reactor (bottom).

Battle backgrounds for areas inside (top) and for the core (bottom).

Encounters Areas
Platform, Sector 1 Station, Sector 1
  • [scripted] MP x2
Outside Reactor (after Guard Scorpion is defeated)
Main staircase
Upper piping
Lower piping

Random encounters at the platform are available until the player leaves the screen and returns, in the player's first visit.

Inside, various enemies are fought as random encounters, though most are dispatched with only one or two hits by Cloud or Barret, and deal little damage. The Sweeper, fought around the lower piping, is the most durable among them, which takes several hits to be defeated first. When encountered alongside other enemies, the smaller enemies should be defeated first to remove the damage they deal; otherwise, they are best dispatched by casting Bolt from Cloud.

The Guard Scorpion is fought as a boss in the core. This boss should be attacked by Cloud's Bolts while Barret uses normal attacks. When the Guard Scorpion raises its tail, it will counterattack until the tail is lowered. The player should either use Potions to heal in this time or simply avoid attacking until its tail is lowered, and then continue to damage it until it is destroyed.


Items Areas
Potion x2 Platform (from either guard, or two from one of the guards)
Potion x1 Entrance, upper piping
Restore Materia Core
Assault Gun Core (dropped by Guard Scorpion)

At the platform, the guards are left behind unconscious after being knocked out by AVALANCHE. Two Potion items can be picked up from them. Though both guards can have the items, their items are shared meaning the player can pick up both Potion items from one guard. This is known as the Quantum Potion bug.

Inside the reactor, a Potion is found in a treasure chest in the room on the southeast of the entrance, and another is found lying on the ground at the bottom end of the upper piping. By the reactor core, a Restore Materia can be picked up before reaching the core, and after defeating Guard Scorpion, the Assault Gun is obtained.

Infiltrating Sector 1 Reactor

The mission begins at the Platform, commencing immediately after the opening movie finishes. When entering the Platform, the cast exit off the train to Sector 1 and knock down two troops. Heading north in this scene ensues the first battle of the game as two soldiers run towards the player. After this battle, the player can take an exit on the left to enter the Sector 1 Station area. Two Potion items can be picked up here from the guards.

The player then enters from the Sector 1 Station from the bottom-left of the screen. Here, other members of AVALANCHE will be standing around before running towards the exit. After a conversation, the player gets to name the Ex-SOLDIER, which defaults to "Cloud". Another member of AVALANCHE will then run on screen, the second playable character who can then be named, default "Barret". After the North Gate is open, a small scene occurs and the character automatically runs into the Sector 1 area.

In this area, the player must run right, up, and then to the left of the screen where they will find the exit to a walkway outside the No. 1 Reactor. The door on the far left exits out into Sector 8, and the door at the top of the screen leads into the No. 1 Reactor. The area is two straight pathways in a T-formation. Next to the door to Sector 8 is "N-8th" is written on the wall next to this door.

When the player first enters the outside walkway, Wedge waits at the door to Sector 8 to secure the escape passage. The mission then proceeds inside the Sector 1 Reactor.

Destroying the Reactor

After infiltrating the Reactor, Cloud and Barret begin at the entrance. Here, the player must interact with Biggs to decipher the code of the first door, and then with Jessie to open the second door and the elevator. After this, the elevator must be activated to the main staircase. Dialogue with Barret will initiate until the elevator reaches its destination.

Following this, the player must descend down through the main staircase to reach the piping. Along the way, the player will encounter a variety of enemies in random encounters, though these enemies are straightforward and can be defeated in one or two hits. After reaching the piping, the player must interact with the ladder to descend down further. A Potion can be picked up in the upper piping before descending down to the lower piping. The Sweeper can be fought as an encounter here; this enemy is more durable and can take multiple hits, meaning that it is best to defeat its accompanying enemies before focusing against it.

Eventually, the player will reach a walkway towards the core. Along the walkway, a Restore Materia can be picked up before reaching the core. Here, a short scene commences, and the Guard Scorpion must be fought. Once defeated, a timer initiates. The player must run back and ascend up the Reactor to the exit before the ten minutes expire, at which point the Reactor will explode. Though the player can still fight random encounters, it may be wise to run away if time is low. Along the way, Jessie will be found caught in the pipes; she needs to be rescued along the way or the player will be unable to escape. Upon escaping the Reactor, the next quest commences in Sector 8.

Escaping Sector 1 Reactor

The player returns to the walkway just outside the reactor after planting the bomb inside. Upon reaching the area outside the reactor, the player meets up with Wedge, and a cutscene plays. The characters run from the reactor out to Sector 8.

Final Fantasy VII Remake

Balthier ffxiirw.PNG
Balthier: I'm afraid the jury's still out on that one.
This article or section is about the gameplay specifics of Final Fantasy VII Remake that's still to be released. As such, some of the information might be inaccurate or likely to change. Please look over our policy for updating articles covering upcoming games before editing this page.


Area Enemies
Mako Reactor 1
Mako Reactor 1 - Interior
Mako Reactor 1 - Utility Access
Mako Reactor 1 - Core


Items Location
Mako Reactor 1
Potion x2 Above the station, just after climbing the staircase
Grenade x2 Above the station, behind the stair railing, beside some vending machines
Ether x1 Inside the Reactor Grounds, its first portion, in a narrow space to the north
Potion x2 Wide area with a forklift and crates, just before the switch
Mako Reactor 1 - Interior
Phoenix Down x1 In front of the elevator leading to Utility Access
Mako Reactor 1 - Utility Access
Potion x2 After passing through all the lasers, before the stairs
Ether x1 After Jessie's introduces the sweeper, turn around and head for the left of the staircase
Phoenix Down x1 Above the core area, after climbing down the first ladder, head to the end of the platform
Ether x1 One ladder above the lowest platform, to the west

Musical themes

"Opening ~ Bombing Mission" from Final Fantasy VII

On the reactor grounds "Opening - Bombing Mission" (オープニング~爆破ミッション, Ōpuningu ~ Bakuha Misshon?) plays. The theme has been remixed several times, and also appears in Crisis Core -Final Fantasy VII-.

"Mako Reactor" plays inside the reactor itself until the Guard Scorpion battle begins, where the background theme changes back to "Bombing Mission".

Behind the scenes

Cloud's ominous message.

During the mission Cloud has a moment where he breaks down and hears a voice that says, "This isn't just a reactor". In a scene that was scrapped from the final version of the game, Cloud would have had a conversation with Sephiroth where the latter would have explained what Mako Reactors really are. The "This isn't just a reactor" memory is a remnant of this deleted scene.

The PC port had a bug that occurred intermittently to crash the game at the start of the game as the train pulls into the station and an AVALANCHE member kicks a soldier. QA reported this bug as the port was being finalized, and all the programmers were scrambling to reprogram and debug it.[1]

Other appearances

Final Fantasy VII demo

Part fighting in the "Aeris" demo.

The Sector 1 Reactor bombing mission is the setting for the two PlayStation demos of Final Fantasy VII. Two versions of the demo exist, often differentiated by the third playable character: Aeris or Tifa. The Aeris demo is of earlier build and still has many changes from the final version. The Tifa demo is closer to the playable segment in the full game. In the final game of course, neither girl is playable, and only Cloud and Barret are in the player's party. Both demos end when AVALANCHE escapes the exploding reactor.

Final Fantasy Airborne Brigade

FFAB Sector 1 Reactor FFVII Special.png
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Final Fantasy Record Keeper

Painting image.

A former member of SOLDIER has come to destroy one of the Mako Reactors--machines that harness the planet's Lifestream to generate power.


Mako Reactor No. 1 is the first dungeon available whose completion unlocks Mako Reactor No. 5 in the Final Fantasy VII realm.

Final Fantasy Brave Exvius

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