Omega: Aria T'Loak (Mass Effect 3)

Rendezvous with Aria's Fleet.

Acquisition
Complete Citadel: Aria T'Loak.

The Invasion of Omega
Travel to Aria's Fleet in the Widow system, Serpent Nebula to begin the mission.

After you evacuate from Aria's ship in escape pods, you crash into a hangar filled with Cerberus operatives. Once you regain control of Shepard, clear the room of Cerberus Troopers and Centurions. If you haven’t already, this is a great time to allocate squad points to Aria, and especially her unique Flare power. Be sure to pick up the two Medical Kits nearby before advancing. Once you're ready, use the panel to open the blast doors.

If you've been playing the original ME3 missions, you'll find that Omega has a LOT more spare grenades laying around as you move forward. So if your Shepard has a grenade ability you can use it fairly freely.

More Cerberus units are present inside the next room, including Guardians. Aria’s Lash ability may be useful here to players without effective control against them. Once you clear out this room, look across from the door at the end of the room; there are some crates next to a docked fighter where you'll find some salvage worth 3000 Credits, and an Assault Rifle High-Velocity Barrel mod. After collecting any missed items, use the door on the right to enter an elevator, which takes you to an upper level.

The next area, highlighted on screen as containing the ‘Defense System’, has a point of entry through the right of Atrium 9. Before entering look to your left to examine a computer terminal. Next, you’ll enter what appears to be a ventilation room, filled with more Cerberus troops. Cerberus Engineers are found in this area, and you should try to dispatch them before they deploy Turrets. Once cleared, Aria will call to Shepard’s attention that the room ahead needs to be pressurized. You’ll have to hold off another wave of Cerberus soldiers whilst you wait. They will enter the room from behind you at this point. There is a lot of cover for you, and it shouldn't be too hard to take them all down. Once the door’s panel turns green, you are able to carry on. Before leaving this room, there is a Med Station to the right of the door on the wall.

After walking down a hallway, where Aria and Shepard comment on the crashed escape pod, you will have to bypass the door which leads to the control room for the defense guns that are ripping Aria’s fleet apart. A short firefight will ensue, but again, there is plenty of cover and it shouldn't be too hard. Aria’s Flare will work wonders against the tightly packed enemies in this room, especially combined with a Biotic-Shepard's Power Combinations if playing on higher difficulties.

The panel in front of the holographic map needs to be deactivated for the guns to stop firing, allowing the fleet to then enter Omega. A short cutscene will play out. While General Petrovsky occupies his time with a game of chess, continue to another elevator. Before leaving the control room, you can find both a Med Station on the leftward wall and a Med Kit. Before entering the elevator, look up to examine the screen, showing Cerberus troops fighting the other pod's teams. Moving on, you will be shot at immediately after the doors open, so stay on your toes. Clear out the garage, and open the doors on the far side. In the next room, before the open area with the Omega skyline, you'll find 3000 Credits in a Wall Safe on lefthand wall right as you enter.

Depending on perspective, you are either treated to a stunning skyline of Omega, or are forced to fight through grungy streets whilst being bared down by the looming buildings. You’ll also discover that Cerberus has developed new technology, allowing them to deploy powerful orange-colored force fields, blocking off certain areas of the station. Before moving onward, be sure to pick up the 1500 Credits from the salvage next to the dead batarian, a Pistol Heavy Barrel mod to the left of the same corpse. Examine the terminal to activate a Cerberus VI which gives a clue at how much Cerberus has the station locked down. Later, you will find a Med Kit in the hallway you will need to traverse to continue. After taking down more Cerberus soldiers, another elevator awaits you. When accessing the elevator, Aria comments on the Talon graffiti on some crates.

Exit the elevator into a hallway where Shepard can examine another crate marked with Talon graffiti. Nearby, you can find some salvage containing 2250 Credits. Follow the rendezvous point marker to advance.

Move ahead and turn to the right to see one of Aria's soldiers and jump down to witness a grisly scene, and a new enemy. Rampart Mechs are synthetic foes that will try and close the distance to effectively use their shotguns. Thus, try and keep them at a distance. Powers that effect armour and synthetics can help dispatch them. Alternatively, aim for headshots to make short work of them. There is a Med Kit at the far end of the hall near the force field for you to collect.

When destroyed, Rampart Mech remains discharge intense heat for a short period which damages you, squad or enemies upon contact.

Finish them off then join Aria at the force field. Aria will then show Shepard a secret passageway with a ladder that leads into the next area. Before following down the ladder, be sure to pick up the Shotgun High-Velocity Barrel mod on the crates in the middle of this small room. There is a Med Station on the leftward wall you can use to gain some extra experience, Credits or some Medi-Gel, if needed. When ready, enter Aria’s secret tunnels to gain another new squad member.

Meet Nyreen Kandros, a female turian. You can allocate points to her from the Squad menu as soon as you regain control. Before moving on through the next door, there is some salvage with 3000 Credits and a Datapad worth 2250 Credits you can pick up, as well as the Valkyrie assault rifle if you don't already own it through pre-order bonuses. Bypass the door ahead to continue. There will be a weapons bench against the wall to your right. It is advised to use the feature to upgrade or swap out your squad’s standard weapons.

Move ahead down the tunnel, and then use the ladder to get to the upper level. Before rushing through into battle be sure to use the Med Station, that is obscured by the fire near the window opening you can then use to jump onto the balcony below. There will be a large amount of Cerberus infantry on the balcony in front of you. Rampart mechs and even an Atlas will be present. It’s easier to take care of the weaker enemies before concentrating on the Atlas. Once you clear out the first wave, more enemies will jump down. There is a Med Station (on the inner wall of some bar at the left) and two Med Kits (one near the Med Station at the bar and other right on the other side of the battleground), so be sure to grab them before moving forward.

Aria's lieutenant, Bray, will point out a target for you. The target is a Cerberus Engineer who is jamming the cannon controls. Concentrate on the other troops before you take him out, because as soon as you do, another Atlas will deploy in front of the cannon controls. Second target is the cannon controls itself. Once you activate it the cutscene will follow, finishing the fight and relocating your squad to the Aria's Bunker, so be sure to grab everything you need beforehand. This may be the quickest way to finish the battle (no need to deal with the Atlas or the other troops) if you have already grabbed everything you need, though it might be easier to deal with the Atlas first to search the place without disturbance.

Your allies will be firing across the bridge inaccurately. Their shots will not damage you.

Aria's Bunker
Inside Aria's Bunker, Aria leaves you to your own devices and says to meet her in the control room to discuss the next leg of the mission. Take this time to acquire two side missions, Omega: Assist the Hacker and Omega: Assist the Mechanic, both of which can be completed in the next mission area. You can also make use of the weapon bench and armor locker in a corner of the room to prepare.

Once ready, speak to Aria. She wants to recruit the Talons to her cause, so she needs to locate their leader. Aria also notices that Nyreen has unexpectedly vanished from the bunker, but forges ahead with the mission. You can now exit the bunker via the door Aria pointed out to progress, or continue preparing and acquiring side missions. Speaking to Aria will provide new dialogue options that shed some light on her state of mind, her past with Nyreen, her thoughts on General Petrovsky and the state of the liberation campaign.

Access the unlocked door when ready.

Talon Territory
After the cutscenes, head down the corridor and examine the crates for discussion of the Talons and red sand. You'll learn that Aria believes a turian by the name of 'Derius' is their leader. Head right across the gap and up the ladder to find a datapad (1500 credits) to the left before the stairs.

On the right after the stairs you will find the first hacker terminal and a lift control. The lift is jammed until you shoot the explosive crates on it. Head back down to the now functional lift and use it to get the Assault Rifle High-Velocity Barrel, then return to use the airlock control to access the vents and continue towards Talon territory.

A datapad (1500 credits) can be found straight ahead soon after Ahz patches you in to Cerberus comms. Examine the control switch and terminal, which you'll find will not work without power. A datapad with a mission report is to the right of the terminal. Reactivate the generator to operate the terminal, which is not one of the three hacker terminals, and open the air seal to continue.

After you go down the ladder outside the vents, you will find salvage on the left behind some crates (1500 credits). At the bottom of the stairs, you'll find another salvage (1500 credits). Open the door and head down the stairs into a fight with centurions, assault troopers, a combat engineer, and a shield pylon in the far right of the room. The second hacker terminal is in the right corner of the room, when facing the windows with Omega's skyline.

A small room with a broken window contains a datapad (1500 credits), and there is medical station to your left before the next door. An assault trooper will be standing with his back to you when you open the door, and an engineer waits in the adjacent room. Take them out and deactivate the lockdown in the next room. A datapad (1500 credits) is in the right corner of the lockdown control room. A medical station is on the left wall of the corridor.

Releasing the lockdown opens the elevator door on the far side of the main room, letting out some Rampart Mechs and a Guardian. Taking out the mechs while all three are in the elevator may set the guardian on fire. Revive the downed Talon in the other room for some exp and then access the hacker terminal behind him. Enter the elevator once you're done.

As you head down the corridor, assault troopers and more Rampart Mechs will run into the corridor from the landing pad. Take them out before taking cover behind the door frame, because a charging mech, an Assault Trooper, a Combat Engineer, and a deployed turret await. You may want to take out the shield pylons at the middle and far end of the landing pad before you finish killing off the enemies here, because as soon as the last one falls a shuttle flies in to drop another wave of Rampart Mechs, Troopers and Combat Engineers, followed by a wave of Centurions, Troopers, and another Engineer.

There's a Med Station on the left wall of the area before the first landing pad, and a medkit is found at the lower landing pad drop point. Two more downed Talons are to either side of the destroyed shuttle on the lower landing pad, go revive them for more exp. Then head down the stairs and bypass the door.

A short, but revealing, cutscene is given of some Cerberus goons trying to interrogate Talon mercenaries, before their leader rescues them in style.

It's Nyreen, hoodless, and she's revealed to be the real leader of the Talons. Whatever your reasons for being in Talon territory, the answer is no. Or so she claims, because whatever you reply to her she'll be convinced to rejoin you and Aria once more.

After you regain control, you'll be facing the exit, but there's a Shotgun High-Velocity Barrel, and a datapad (1500 credits) to grab in the room before you go through the doors and take the elevator up. Right near the exit there is a new assault rifle Phaeston next of a med station and a bunch of ammo clips. And if you leveled up fighting all those Cerberus goons it might be a good time to bring you and your squad's skills up to speed.

As you enter the open area ahead, Rampart Mechs will start streaming in through the red forcefield to your left, next to two shield pylons. If you have a gun with a decent scope, it may be worth your time to take out the pylons while you're still near the elevator. Once you're down to only one Rampart Mech, an Atlas will show up. Remember that Nyreen has Overload and it's useful against the shields. Not to mention there are two Hydra Missile Launchers in the center of the area, one near the left barrier and the other on the stack of crates towards the right. Deploy both as you wish, or save one for later.

Afterwards, salvage (1500 credits) on the right side of the room just before a gap you can jump to the open area, and a med kit on the right in the open area under the burning shuttle. One more med kit is on the left near the entry point close to the burning fire. Head through the far doors to the elevator. You might want to take one of the missile launchers with you before you do.

When your ride is suddenly cut short, shoot the latch off to open emergency access and drop a ladder into the elevator. If you took a missile launcher with you, simply swap it out for a normal weapon to shoot the latch, then pick it up off the floor again. Grab the datapad (1500 credits) off the catwalks before descending the ladders in the elevator shaft until you reach the door.

There will be a medkit immediately on your right as you exit onto the catwalks leading directly to the Talon outpost entrance. Salvage (1500 credits) in front of catwalks burning gap. A shuttle will drop off Cerberus troops behind a smokescreen on the catwalks, followed by two Phantoms, then Centurions, Troopers, and some Nemeses. The Hydra missile launcher from earlier will come in handy to quickly end the fight against the Phantoms.

If playing Vanguard, it is prudent to limit usage of Biotic Charge in this section as executing it improperly WILL cause Shepard to die even with full health and shields. See Bugs section below.

There's a Sniper Rifle Thermal Scope on the right-side catwalk near an ammo pile. Pick it up then examine the door at the end to start a continuous wave of Centurions and Troopers dropping down to the catwalks from a bridge above that ends when the door bypass is finished. Towards the end, Nyreen will comment that they've hacked the bridge controls, which will prevent two Atlases from dropping into the fight, although they can still shoot you for a while before the bridge closes off.

Head in through the doors, grab the medkit, then take the elevator to enter the Talon Outpost. After regaining control, there is a Shotgun Omni-Blade immediately on your right. If you revived the Talon in the lockdown room earlier, he will say thanks, and you can overhear more about Adjutants near him. To your left, behind some boxes where a salarian and a turian are discussing medical supplies, you'll find the Kehri Inverter that the mechanic is looking for. A datapad with a scout report is near Nyreen.

Talk with Nyreen to kick off the cutscene with Aria's inspiring speech. Looks like Nyreen is not the only one who disapproves of the speech, as Cerberus forces are once again assaulting the outpost en masse. A fight in the landing pad area against Centurions, Assault Troopers, and Rampart Mechs awaits, and that Nyreen won't be joining you on this one since she and her people will be holding the front doors so deploy your standard tactics with only Aria in mind.

Also that the area before the first door to the landing pad is the last place for manual saving in this section, so take advantage of that fact if you must.

After the fight, there are two more Talons you can revive for more experience - one against the wall to your left, and one in the right back corner.

Your last fight at the Talon outpost will be at the main gates against Centurions, Troopers, and Rampart Mechs. The last wave will be another Atlas that likes to keep itself concealed with smokescreens. The area is studded with cover barricades and shield pylons will be supporting the Cerberus troops on the far end. Depending on your moves that may either turn out to be a hindrance or an advantage. There are two turrets by the sealed base door, but they cannot be mounted so fight with your own skills and Nyreen's. She will join you on this so maim, kill and burn accordingly. There are also two Med Kits close to the right wall near the entrance. Make sure to grab them before you take out the rest of the Cerberus forces, as this will trigger a cutscene.

, the turret in the wheeled vehicle just outside to the right of the barricades and accessible via ladder is mountable, so provided you've cleared a path to there you can use it to mop up the remaining goons with less effort. After the fight finishes, you'll automatically return to Aria's Bunker.

Aria's Bunker
Talk to the mechanic to give him the inverter and finish his mission. Harrot will ask you to get him coordinates for Aria's couch, and has a few weapon mods for sale at his kiosk. Make use of the weapon bench and adjust your armor as necessary.

Talk to Aria to go over the plan. Nyreen will be waiting near the Med Bay doors, giving you to opportunity to investigate into her past and what's going on at Omega. Use the door to leave the area when you're ready.

The Mines
First off, that this will be the last section you get to have Nyreen as a squadmate so use and level her abilities to the fullest extent.

You'll initially be wandering around an eezo processing facility in the dark, so you may want to wait until you power the place up to look for items. If not, no worries, they're still there regardless of lighting conditions.

So at first, just follow the trail of dead Cerberus Troopers. When your companions warn you, turn to the left and you'll spot something jumping over the pipes above. You'll need to head this way.

After finding the powered-down cargo lift and the glowing red power lines turn so the power lines and door are behind you, head up stairs and around to the left to find salvage (2250 credits) on top of some crates. A datapad across from the disabled elevator controls contains a security memo discussing the facility lockdown.

When that's done, follow the pipes to a ladder to access an upper catwalk. Drop down to the pipes and jump the gap to another pipeline on your right, following the glowing power pipes to another catwalk. Ignore the open doorway and go ahead around the corner to salvage 1500 credits from a pile of boxes.

Head back towards the opening, and jump down into the control room. If you want a manual save, do so before jumping down the control room as it's disabled there. Restore the power to finally catch sight of whatever is infesting the area. A solitary Adjutant will attack your squad, breaking in from a nearby wall.

The control center's small, squarish and cramped layout minimizes free movement and keeping a far enough distance will cause the Adjutant to either fire a Singularity or close in by jumping if it finds an unobstructed path to its target. However, using Overload, Flare, Incinerate and your own abilities while deftly moving from cover to cover and/or straight-up unloading on it as Shepard advises should make short work of it.

Once it's dead, manual saving in the area will be available again. Bypass the door and make your way back to the cargo lift. Once you get close enough, your squadmates will point out that there is another Adjutant in the vicinity. Taking it out will release three more, so don't drop your guard.

Use cover, focus on one at a time, keep all of them within visual range at all times, and it should be pretty simple. Just don't let them get too close to use their powerful melee attacks. The elevator door won't open unless you clear the area, so do it then enter the elevator to advance.

It is easy to get lost in the next area because of its size, paths that converge into each other in squares and a general lack of guidance from the direction finder, so as a rule of thumb always orient yourself in the general direction of the massive blue-hued eezo drill far off in the distance. It's also a good idea to take note of the glowing location names in every archway, these locators are fairly unique and pretty much indicate if you're going around in circles or moving forward.

On entering the mines after a long ride upwards, after traversing the catwalk there will be a med-kit immediately to the right, behind some cover just past bins of glowing ore. Turn right into the doorway marked "EEZO ANALYSIS TESTING AUTHORIZED PERSONNEL ONLY" to pick up an Assault Rifle High-Velocity Barrel right on top of a crate. By this point Cerberus will have been alerted to your presence and sends some goons on your way shortly. Be mindful of shield pylons to either use to your advantage or destroy, and kill all troops you come across.

Aria will spot a maintenance lift you can use to reach the upper levels, but Cerberus will blow the bridge before you get to it. Two Nemeses will pop out from the lift on the far side, knowing you can't close in to engage, so prove them wrong by dispatching them long-range. On occasion they may try for the lower ground, and there's a ladder near the destroyed bridge that drops down to the same area. Dispose of them as you will, either way, more Cerberus troops will show up once you slide down from the ladder and you'll have more to kill.

There will be a locked area labeled "MAINTENANCE AREA" not far from your initial position. Bypass the door, pick up the Pistol Heavy Barrel, and head down the ladder. There's a med-station on the left just before the stairs, on the area labeled "AUTHORIZED PERSONNEL ONLY CONVEYOR C". Kill off more Cerberus as you make your way under the conveyor belt. Rampart Mechs are added to the mix, along with a Nemesis, a turret-laying Engineer and a shield pylon in their location to give them extra staying power. When you're done open the door to exit the maintenance area and head up the ladder.

Once you're clear of the ladder, although Aria states "head up", ignore the stairs as there's nothing worthwhile in there. Go instead around the corner to the left, to the area labeled "TRIAGE AREA". Salvage tools (1500 credits), pick up a Sniper Rifle Thermal Scope, and examine a datapad for information on eezo in the room with bins of glowing eezo ore.

Head up the ladder, which leads to the same location as the stairs, then take out more Cerberus operatives. Don't let yourself be blindsided by Rampart Mechs, it's easy for them to go around you given the number of paths in the area. For ammo refills, head up to the higher ground marked "AUTHORIZED PERSONNEL ONLY" and dispose of any Cerberus that may have holed up in there. It might be a good idea to hole up in there yourself as it's on higher ground and there are only two easily defensible entrances.

The elevator up is not much farther now; you can use the direction finder safely at this point.

On exiting the lift, a Combat Engineer will be standing with his back to you as you open the door. Eliminate him any way you want, after turn to your right and take the Shotgun Omni-Blade from the container along the wall, also ammo is there if you need it. Then turn left from the container and follow the path to the dead body to acquire the Chakram Launcher assault rifle.

There's only one way forward, through the door marked "PEDWAY ACCESS". In the room is a med-station to the left, a dead trooper crushed between doors you can salvage (1500 credits), salvageable tools (3750 credits) and a ladder down. Head across the unstable catwalks to the final elevator, marked "MINING COMPLEX". Your companions will comment on the sudden lack of Cerberus attacks, and indeed no one harasses you even when you reach the reactor level. When you climb up the ladder and see the elevator in the distance, there is another dead trooper (2250 credits) to your left.

On the catwalks near the reactor you can salvage equipment (2250 credits) on boxes just to the left of the reactor. There is also an ammo pile near the boxes to the right. This is also the last moment to take a manual save so do it if you must. Don't stray too close to the reactor after acquiring the goods if you're not ready yet because...

As you approach, a forcefield lights up - it's a trap! A short cutscene ignites Aria's fiery temper, and she tries to pry open a hole with her biotics. You and Nyreen have to protect her by holding off waves of Rampart Mechs.

Technically, you don't really have to stick with Aria to protect her as your only objective here is to survive all the waves. With that in mind, you can just circle the area's perimeter, gunning down mechs as they come. Go hand-to-hand on them if it's your thing and let Nyreen do the long-range damaging, just make sure to have eyes on the back of your head while doing so. Alternatively, on higher difficulties, it's better to just hunker down beside Nyreen, make use of her Biotic Protector tactically, and shoot for your life. Now is a good time to spam all your armor-damaging abilities as well as Nyreen's Incinerate.

When the waves end, the two combine their biotics to let you through a small gap in the barrier. You'll have to make your way to the reactor alone, and a med-kit is immediately to your left up the stairs. Rampart Mechs and Assault Troopers will attempt to stop you. Cover is sporadic and limited to single crates, and you can do one of two things: wing it and beeline for the reactor while outrunning the Rampart mechs dropping from behind and dodging/ignoring the fire, or gun everyone down the slow but safe way. Head around to the reactor controls, another "AUTHORIZED PERSONNEL ONLY" area.

Once you're there, you're presented with a difficult choice. You can either reroute reactor power to just take down the forcefields, risking both squadmates' lives. Or you can use one of several renegade interrupts to override the power, shutting down the fields immediately, but sacrificing life support for thousands on Omega. However, if you're an Engineer, you can also use a Paragon interrupt to reroute reactor power quickly.

The Assault on Afterlife
You and Aria split off to take out the bombs before they destroy support columns granting access to Afterlife.

A Sniper Rifle Thermal Scope will be immediately on your right when you regain control, a medkit is available just to the left of the stairs, and a work bench is just opposite of the stairs.

Storm the catwalks, which are defended by Rampart Mechs, Centurions, and Nemeses, buttressed by two Shield Pylons. After you defeat them, the bridge across explodes. Head into the control room, extend the dam then head across. Go to your left to pick up a datapad (1500 credits), then head down the ladder to get the coordinates for Aria's couch (1800 credits) and get a comment from Aria. Continue through the open doorway, grabbing the medstation on your left before bypassing the door.

Take out four Guardians. Open the green door and examine equipment (1500 credits), then bypass the other door to continue. Slide down a ramp, deactivate the spinning fan, then jump the gap to stop the Combat Engineer and Troopers messing with the support columns. There's a medkit on each of the four platforms (two raised, two with giant fans) that line the walls around the perimeter of the room.

Use the access panel controls and all four bombs go live just as Cerberus forces drop in. You have five minutes to disable the bombs. There's plenty of cover in the rigged support structures, simply pop out and shoot anybody who goes near you. It's also fairly easy to get the enemies to train out behind you as you run quickly to each successive bomb. After the bombs are taken care of, clear out the remaining Cerberus forces.

Talk to Aria, and she'll take out the remaining fan in the room. Jump the gap, bypass the door, and head up the ladder. A Shotgun High-Velocity Barrel is on the floor behind the next ladder. A bunch of Cerberus get tossed out of the high windows, head left to pick up a medkit and some equipment (1500 credits), then go up the ladder to witness a trio of Cerberus Troopers getting massacred by an Adjutant, with one getting bashed on a window.

Head through the next door and follow the catwalks around. A door on the way provides access to a locker (1500 credits). Continue along the catwalks and down the ramp.

Examine the video log for more information on how Cerberus created the Adjutants. Head to the right of the video log to pick up a datapad (1500 credits). Continue through the door. A datapad pertaining to the escaped test Adjutants is on your right just before the next door. The doors only open one at a time, so wait for Aria to unlock the next door and proceed.

Open the door to Gozu district just in time to see a civilian take a grenade and knocking you back, regardless of your distance from the door. There are few Assault Troopers and a Nemesis. As soon as you enter the doorway an Atlas will drop and start circling to your right. It is recommended to start this fight from the doorway so you have an opportunity to deal with Nemesis and first enemies prior the Atlas descend. The positioning of the troops and the persistence of the Atlas make this fight ugly. But with proper knowledge of the terrain turns easy enough. You can climb up the ladder at the far end of the room to pick off the enemies from a distance and protect yourself from the Atlas. There's a medkit at the bottom of the ladder on the left side of the room from the entrance and a second one on the other (right) side. After clearing them out, head up one of the ladders to open a door for some equipment (1500 credits). Bypass the door on the ground floor and head up a ladder to enter the slums. Aria will mention Mordin.

Head to the left for a datapad (1500 credits), then return to the right. A Pistol Heavy Barrel will be straight ahead through the doorway down a short drop.

Head through the next doorway. Examine a dead Cerberus trooper for 1500 credits, then go through the door to kill off a Combat Engineer, Centurions, and a Guardian backed by two Shield Pylons. There's a medkit to the right before the stairs.

Head up stairs and bypass the door to enter Talon-held territory. Salvage junk (1200 credits) from boxes near a turian civilian you can talk to, then head through the door on your left to talk to an asari civilian, examine some lab equipment (1200 credits), and use a workbench. As this is your last chance to change the weapon loadout, you might want to take the Venom Shotgun with you as it will help immensely in the final fight. Head down the hall past the batarian civilian, and pick up a Shotgun Omni-Blade at the armed barricade. Take the elevator and find out that Nyreen is heading to Afterlife on her own.

After the cutscenes turn left for a datapad, save, and then catch up with Aria to face off with Petrovsky in Afterlife.

This is a tough one - you are on your own with a bunch of adjutants, Nemeses prowling the upper levels, and other Cerberus troops popping in to stop you. Each of the generator override controls is next to a shield pylon, and you have limited time before Aria is killed off. Activate a generator control, shoot out the generator pylon near Aria, then rush to the next one.

Do NOT take out the generators from the ground floor - with every destroyed generator, Aria will unleash a deadly biotic pulse that will crash your shields and damage you badly. Leaving the shield pylons near the generator controls will help you immensely. While the terrain of the terrace is simple to navigate, it offers very little in terms of cover, and with enemies keep respawning until you freed Aria, coupled with limited ammo pickup on the level, the only safe bet is to run and gun, while all the time beware not to get boxed in - Adjutants love to get close and put their deadly melee attacks into play, and the narrow walkway leaves very little room to dodge.

When playing on the highest difficulty levels, duck quickly to your right and up the stairs. From behind the relative safety of the override console (and with the shield pylon recharging you) is a good location to take out some of the enemies blocking you from the next console. Then dash halfway down the corridor, quickly shoot the generator (you're good with your sniper rifle, right?) and run the rest of the way to the next console where you lather, rinse, repeat. The relatively slow Adjutants will tend to end up chasing along behind you, so you won't often have to engage them before Aria is freed; you can save most of your abilities/ammo to clear Cerberus guys and gals out of your way.

Lastly, there are two medkits, one along each of the long pathways against the walls. When you're ready, bypass the door to face Petrovsky in his den.

Aftermath
Depending on the overall morality of your actions during this mission, Aria will either kill (Renegade) or spare (Paragon) General Petrovsky. If Aria is unwilling to spare Petrovsky, you can use two Paragon Interrupts to force her to spare Petrovsky, though doing so will considerably sour her attitude towards you. If Aria delivers Petrovsky to you, you can use two Renegade Interrupts to kill the general yourself by shooting him in the head.

Completing this mission earns you 15,000 credits, unlocks Flare and Lash in the Med Bay, and nets you the Omega Raiding Fleet and Omega Eezo Hoard War Assets. Sparing Petrovsky will earn you a third War Asset worth 30 points. Killing him will add 30 points to the Alliance First Fleet.

After you return to the Normandy, you'll receive an email from Aria informing you she's had Petrovsky's chess set sent to your cabin.

Enemies

 * Adjutant
 * Assault Trooper
 * Atlas
 * Centurion
 * Combat Engineer
 * Guardian
 * Nemesis
 * Phantom
 * Rampart Mech
 * Turret

Bugs

 * Vanguard players should limit usage of Biotic Charge during the catwalks segment of Talon Territory as there is a huge chance of Shepard dying. See this discussion for possible explanations and some quick workarounds.