X57: Bring Down the Sky

After landing on this small asteroid, you were contacted by a human. Three fusion torches are being used to direct the asteroid into the path of a nearby planet. She's urged you to find the torches and shut them down.

Acquisition
After downloading the Bring Down the Sky DLC pack, head to the Asgard system in the Exodus Cluster and land on Asteroid X57 to being this assignment.

Approach
When you first approach Asteroid X57, the SSV Normandy's computer alerts you that X57 is heading toward Terra Nova too fast, and is on course to hit the planet Terra Nova within four hours. As the Mako drops on the surface to investigate, you receives an urgent message from a woman who sounds like she's in hiding. She says that 'they' are responsible for attacking the asteroid and begs whoever is receiving this message to shut down the fusion torches, before she signs off.

Drop Zone and First Fusion Torch
You will land close to the first fusion torch, which is clearly visible over the rise. There is also an engineer's shack close behind you. If you investigate the shack first, you'll find a technician's kit with an omni-tool inside, and a dead engineer, Mendel. Investigating his body will give you the assignment X57: Missing Engineers.

Continue toward the fusion torch to receive another message from the unknown woman. As you approach the torch, turrets will emerge from the ground: one high on the cliff to the right, three around the fusion torch, and one far to the left of the fusion torch. Unlike turrets encountered in other assignments, these only emerge from the ground when you get close to them, making their rockets much more difficult to dodge. You can also drive straight past them and enter the fusion torch station.

Inside, you'll encounter batarian troopers with a pack of varren. The varren will lunge at you and can be dangerous in melee, so use Neural Shock or a shotgun to drop them, or Throw to keep them back. Once you have cleared them out, proceed through the door on the second floor. You'll find the controls to shut down the fusion torch station. Once it's shut down, you'll be contacted again by the unknown woman, Kate Bowman. She says batarian extremists have attacked the asteroid. She doesn't know why the batarians are here, but they've killed many of the personnel on the asteroid. but has to stop talking before she's discovered.

As you leave the fusion torch station, you'll be shot by a nervous Simon Atwell, however your shields will deflect the shot. He will then give you as much information as you ask for about the asteroid and Kate, and you can discuss the batarian attack with him. Simon will tell you that the asteroid is going to crash into Terra Nova and cause catastrophic damage. Not only will it destroy the colony and kill everyone on the surface, but the devastation will effectively kill the planet. If you ask about Kate, Simon says she's one of his best engineers; both she and her brother Aaron signed up together, and he hopes she won't do anything stupid. You can ask why the batarians are doing this, and Simon will respond that they're pirates, slavers, not planet killers. Simon doesn't know why they changed from just a slave grabbing run to killing the planet, but he has a warning.

Simon explains the next torch station is surrounded by live blasting caps -- giving you the X57: Avoid the Blasting Caps assignment -- and that three of his engineers are missing, which will give you the Missing Engineers assignment if you don't already have it. Simon also says the batarian leader is named Balak, but he doesn't understand why the batarians are doing this.

Blasting Caps and Second Fusion Torch
Once you leave the first fusion torch, get into the Mako and head north between the two mountainous ridges. Before you do this though, you can head up onto a nearby mountain that has a point of interest. There is a transmission tower that is broken but can be fixed with a short mini game or omni-gel. It gives you the location of three survey stations, one you may have already been to when you landed. Going to each of these stations helps to complete X57: Missing Engineers.

If not, head north and you will soon see the second fusion torch, as well as a ring of lights surrounding the nearby area, marking out the danger zone. When you get near to this, you will hear a message saying that there are blasting caps, and caution is advised. The area is also surrounded by turrets. Once the turrets have been dispatched (one to the left behind the hill, two near the fusion torch building, and one a way off to the right), leave the Mako, and head out on foot.

This doesn't mean you can't still set off the blasting caps, however. A meter will appear in the bottom left of your HUD indicating how far away from the explosive devices. A noise will also indicate that you are getting close. Close to the fusion torch is a group of batarians, including two Rocket Troopers. It's possible to Throw them into the blasting caps, but this is tricky. Once they are dealt with, you can shut off the blasting caps from a console just outside the front door.

Inside, you will be confronted by about a dozen batarians with four rocket drones. You can head up onto the raised platform (which has cover) to give you an advantage in disposing of the various enemies. The drones are being overseen by a batarian engineer who can use Sabotage on you. The drones will leave the upper platform, make a circuit round the room and fire at you, before returning to the upper platform to recharge. AI Hacking will make them help you against the batarians. When the room is clear, proceed to the second floor, up the ramp on the far left-hand-side of the room and go through the door at the top to shut down the fusion torch.

You will then get another message over the radio from Kate Bowman, saying that the batarians know someone's shutting down the torches and, to make things worse, intend to blow up the main facility. Before she can finish, the batarian leader Balak pulls her away. He then uses Kate's brother Aaron as leverage by holding a gun to his head, then demands to know who's shutting down the fusion torches. Kate refuses to answer and turns away. Behind her back, Balak pulls the trigger. He then orders his second-in-command, Charn, to "find this problem and deal with it".

Third Fusion Torch and Charn
After you leave the second fusion torch, walk back through the disabled blasting caps and get into the Mako. Drive north-west, over the mountain range until you see the last fusion torch. Destroy the turrets outside, or blitz past them and enter the fusion torch building. There will be about a dozen batarians inside, including shock troopers who use biotics. When you have killed them all, go through the door on the second floor and shut down the last fusion torch.

When you are done shutting down the fusion torch, head back downstairs to find that instead of a message on the radio after you turn the fusion torch off, you receive a visit from Charn. He who suggests they try a peaceful resolution. He claims this was just meant to be a simple slave grab, but the situation's got out of hand. Balak is on a mission to destroy Terra Nova, and the commander is in the way. Charn is under orders to kill Shepard... but he's getting tired of following Balak's little crusade. You can talk to him and choose whether or not you kill him or Charm or Intimidate him into giving up and leaving. Either way you end up with a pass to X57's main facility where Balak is located. If you kill Charn, you have to search his body to get the key, so do this before you leave.

Main Facility and Balak
The main facility of X57 is in the mountain north-east of the third fusion torch so climb into the Mako. When you arrive, destroy both the normal stationary turrets and the mobile turrets on the tracks above, or blitz past them and enter the facility. Head into the building and grab some grenades and medi-gel from the stations near the desk before you enter the main room. The enemies in the main room include Batarian Troopers, Shock Troopers, Engineers, and Defense Drones. You can use either the upstairs or the downstairs, the alcoves on the second level and the medical bay building, to take cover and to eliminate all your enemies.

When all enemies are defeated, Balak will show himself. He will tell you about the troubles his people have faced and blame them all on humanity's influence. He is furious that the torches have been shut down. He sees this as an act of reprisal for humanity's actions in the Skyllian Verge, stealing territories and resources that should have belonged to the batarians, all because the Council saw a military advantage in befriending the Alliance. If you are a War Hero, he has a particular grudge against you after the Skyllian Blitz. Answer as you wish, and he will also tell you that there are hostages locked away in a room with an explosive that he's prepared to detonate, unless you offer him safe passage out of the building and off the asteroid.

You are now faced with a choice: let Balak go, and risk him causing havoc in the future but save the hostages; or attack him knowing you will sacrifice the hostages. If you choose to kill him, you will have to fight through Balak, his batarian bodyguards, two varren and a couple of defense drones. When he's defeated Balak, he threatens that humanity will pay for what it has done to the batarians and you can choose whether or not you leave him for the Alliance military or you can kill him yourself.

Although, if you decide to let him go to save the hostages, you still have to fight. Balak left behind three charges, located around the room and you may have seen them while you were fighting when you entered the building. These charges will explode in ten minutes if you do not disarm them yourself. To make it harder, there are defense drones around the room. The first bomb is located in the curved lower level, the second in the upper level of the medical bay and the third is hidden in an alcove on the second level, opposite to the medical bay.

After the battle, you will meet Simon Atwell again, who will either be saddened by Balak's escape if you saved the hostages, or Katie's death if you killed Balak. He confirms that your efforts worked and the asteroid was slowed enough. X57 was on a direct course for Terra Nova's capital. Now the torches have been disabled, X57 will miss the planet safely. If you went to all the survey stations before you entered the main facility, you can also tell him of the dead scientists at each one. However, he will be grateful for your actions in saving the asteroid and Terra Nova, and offer you a reward. You can choose from either quarian armor, light, medium or heavy human armor or, if your Charm or Intimidate is high enough, his omni-tool.

If you chose to save the hostages, the you can then free them from one of the offices and finally meet Kate Bowman. She is glad to be alive but devastated at the death of her colleagues and her brother. Kate realises she never even asked the Commander's name, and claims Shepard isn't what she expected, but she's very grateful for the help.

Mass Effect 2 Consequences

 * If you completed the Bring Down the Sky there will be a newscast about a memorial celebration on Terra Nova.
 * If you saved Kate Bowman she will send you an e-mail thanking you. She will also be mentioned in a newscast saying she will be giving a speech on Terra Nova during the celebration about the fallen Alliance soldier.
 * If the hostages died or the player did not complete the Bring Down the Sky mission, a newscast will mention that a Reverend Bowman will hold a prayer session for them. If the hostages were saved a newscast will mention Balak escaped and is still at large.

Enemies

 * Batarian Trooper
 * Batarian Engineer
 * Batarian Shock Trooper
 * Defense Drones
 * Turrets