Mass Effect 3: Fuel Reactors - N7 quests walkthrough Mass Effect 3 guide, walkthrough

Last update: 29 October 2022

This page of the Mass Effect 3 game guide contains a walkthrough of the N7 side quest - Fuel Reactors. Among other things, this guide explains when to investigate the Turian fuel depot on Cyone, how to avoid the contaminated area, how to solve the the crane and the console puzzle, how to seal the tanks, and how to behave during the conversation with Riley.

• Reaching the fuel depot on Cyone
• Solving the crane and console puzzle
• Exploration of a new section of the facility
• Sealing the tanks and engaging into a new battle
• Conversation with Riley - important choice
• Defeating the brute and completing the mission

Reaching the fuel depot on Cyone

Received from: Specialist Traynor [Normandy SR-2: Combat Information Center]

Unlocked by: You will be able to start this mission after completing Priority: Geth Dreadnought main quest.

Specialist Traynor will inform you about the possibility of starting this mission some time after completing Priority: Geth Dreadnought main quest and it will occur when you'll approach her station in [Normandy SR-2: Combat Information Center]. Initiate a proper conversation with Traynor to find out the details and she'll tell you about losing contact with a turian fuel depot on the planet Cyone and that someone should investigation the problem.

You can start this mission by opening the galaxy map and planning a trip to the Silean Nebula. Once you're there (Kypladon system) fly to the planet Cyone and confirm that you want to land on its surface. Wait until you're transported to the Cerberus outpost in [Cyone: Fuel reactors], listening to a new conversation with admiral Hackett during the flight.

Solving the crane and console puzzle

Once you've landed talk to Nyrk and take some time to explore this area, because you may find an armor fragment [Rosenkov Materials Chestplate] and a palmtop containing a treatment plan (it's needed to complete Citadel: Chemical Treatment side mission).

It's very important to stay away from the toxic area, because entering it will result in a very quick death. After you're done exploring find captain Railey and talk to her in order to find out what needs to be done so that the facility could start functioning properly again [75 EXP].

Choose the newly unlocked passageway and turn right the first chance you get. Locate spare parts [4000 credits] and then interact with a large console which controls a nearby crane. The console has three buttons, in order to solve the puzzle you have to:

1. Move the crane right (button 3)
2. Put the first object on the ground (button 2)
3. Move the crane left (button 1)
4. Pick up the second object from the ground (button 2)
5. Move the crane right (button 3)

Exploration of a new section of the facility

If you've done everything according to the plan (moving two obstacles towards Riley), then you will be allowed to proceed to a previously unaccessible part of the facility. Once again you should take some time to explore the new area in order to find ammunition and a PDA [3000 credits]. Once you're done locate a ventilation console for sector A and interact with it [75 EXP].

Notice that toxic gases have been vented from the facility and this means it's a good moment to check all areas that were previously unaccessible and doing that will allow you to obtain a PDA [3000 credits] and a med-kit [100 EXP]. Finish off by interacting with a new terminal which controls fuel rods [75 EXP]. This will allow you to advance to the next part of the mission, but it will also trigger a monster battle.

During the battle you should focused mostly on killing marauders, however you must also prevent the husks from moving too close to your team. It's also important to find a good defensive spot where the team can't be surrounded and to remember about destroying barrier engines, because they provide additional protection for enemy units.

Sealing the tanks and engaging into a new battle

After the fights has ended you'll receive a new objective which will be about sealing two tanks. Start by moving towards the tank which is closer to your position and then travel to the other one [150 EXP]. Before you decide to restart the reactor (screen above) [150 EXP] you should definitely save your game, because a new long battle is about to begin.

As soon as the fights have started you should do two different things. The first thing is to order the team to take cover near the terminal (there's a lower path there) and the second thing is to quickly destroy all nearby barrier engines so that the monsters heading your way won't receive additional biotic shields. The rest stays the same, so you must prevent the husks from moving too close in order to avoid having to struggle with them and you also must be careful while attacking marauders. Notice that some of the monsters will be appearing near the roof of the facility and this means you can kill them if you're fast enough before they manage to descend.

Conversation with Riley - important choice

Continue fighting until you've killed all monsters, however before you eliminate the last one you should try and make a run to the supply stash, because collecting ammunition might be more difficult later on.

Listen to a new conversation with captain Riley during which you'll have to make an important decision. I strongly recommend that you send one of your team members (the one that's less useful to you) to help, because this is the only way to ensure the well being of Riley.

Defeating the brute and completing the mission

As soon as you've made the decision about sending backup (or not) you'll begin the final battle of this quest and aside from standard monsters you're also going to be attacked by a single brute. It's easier to win this battle if you have two squad members with you, however having only one ally doesn't necessarily mean major trouble. Make sure to avoid brute's powerful charges and to use a shotgun and good grenades while trying to kill the beast. Deal with other monsters AFTER you've eliminated the brute.

Don't leave this area just yet, because you must interact with one more console to start the final sequence [225 EXP]. Use the passageway where the last group monsters appeared and return to the area where you've started this mission.

If you've sent one of your team members to help captain Riley, then she'll still be alive (screen above). If you didn't send anyone as backup, then Nyrek will be the only one alive. Open a nearby door and wait to be transported to the Normandy. Talk to admiral Hackett before ending this quest.

Prizes for completing the mission:

1. [10000 credits]
2. War asset [Advanced Starship Fuel]