Mass Effect 2: Dossier: The Professor - walkthrough Mass Effect 2 guide, walkthrough

Last update: 02 June 2021

Received from: The Illusive Man [Lazarus research station]

Description: This quest will automatically appear in your journal after completing the prologue and getting on board of the new Normandy. Choose the Omega station (Omega Nebula > Sahrabarik) for your next destination and confirm that you want to dock. You can start looking for the professor right away or you can visit Aria in the first place (as a part of Omega: Aria T'Loak quest). If you choose to speak to Aria you'll find out that Mordin is inside a quarantined zone. You can get there by finding a long corridor in the south-eastern section of [Omega - Market district]. The corridor you're looking for is located next to the Mad Prophet.

Proceed to the other end of the corridor until you come across a closed door. Talk to the District guard to find out that members of other races are falling victim to a mysterious plague. There are three ways of gaining access to the new area - you can convince the guard of your good intentions (paragon dialogue option), you can force him to cooperate (renegade dialogue option) or you can ignore his warnings. I wouldn't recommend choosing the last option, because the guards in the slums wouldn't know about letting you through and you would have to fight them as well. Bear in mind that you'll only be allowed to take other humans for this mission (Miranda and Jacob will do just fine) so even if you already added other members to your team they'll have to remain on board of the Normandy.

You'll automatically be transported to [Omega - Slums] after finishing your conversation with the guard. Start off by exploring the first room. A container with 250 units of element zero can be found next to one of the dead bodies. Head forward. There's a turian outpost just around the corner. If you've convinced the guard you'll be fine, but otherwise you'll have to attack the guards before moving on with the mission. It shouldn't be a big problem to defeat them as long as you remember about using cover.

Don't forget to interact with a medical station along the way. Proceed towards the only available door. If you haven't started the previous fight you will encounter one guard here who will let you through. Head down and get ready to attack the first group of the soldiers of the Blue Suns. It would be a good idea to find cover near the stairs in order to attack them without taking serious risks.

I would recommend that you ignore the main mission for the time being and head forward to explore the surrounding area. Find a bank terminal near the door. Hacking into the terminal (well-known mini-game) will result in receiving 5000 credits. Open a nearby door to gain access to a warehouse. Here you can find power cells for your heavy weapons.

Don't leave this area just yet. Hack a nearby door (first screenshot) to gain access to the second warehouse (mini-game). Once you're inside you can examine the turian's body and interact with a console found on the wall to play four recordings. Go back to the area where you've defeated the last group of soldiers.

Head forward and it shouldn't take long until you meet a sick batarian. Talk to him to find out about the location of the professor. If you want to score paragon points here you can do two things - wait for a paragon interrupt (second screenshot) to heal some of his wounds and promise to tell Mordin about him. Aside from that you'll have a chance to ask him a few standard questions - about him, this location and the plague.

You must now choose a corridor found to your left and it shouldn't take long until you come across a new door found to your right. Notice that the door is locked, so you'll have to solve the mini-game to break the lock. Use the stairs and look around. Find a safe containing 4000 credits and listen to a new recording. You may go back up.

A large group of enemy units is stationed in the next room. Order your team members to take cover behind large objects. You can simply start shooting at the enemies or you can try being creative and attack them by surprise. There are several opportunities here - you can choose one of the side corridors to flank them (first screenshot) or you can attack them from an upper balcony (second screenshot). Watch out for more resistant legionnaires - they're using shields and you'll have to destroy them before you'll have a chance to kill them.

Once you've successfully eliminated all enemies you should spend some time looking around and collecting ammunition. It would also be a good idea to inspect an upper balcony to find spare parts (1000 credits) and a med kit. Proceed towards the barricade (the same one that was being defended by the last group of foes).

Check the area in the vicinity of the barricade to locate a door leading to one of the apartments. The door is locked, so you'll have to solve a mini-game. Enter the apartment and it won't take long until you encounter two refugees. During the conversation you can suggest that they would be safer in the clinic and you can convince them to leave the apartment by choosing the paragon or renegade dialogue option. Explore the apartment to find a safe (4000 credits) and a med kit. Return to the barricade.

Make sure to explore the corridor located behind the barricade thoroughly, because you'll find an interesting rifle next to one of the dead turians. Examine this object to add a new plan for a research project to your database. Proceed forward and make sure to save the game after arriving in a long corridor (second screenshot), because this area is swarming with enemy troops.

I would recommend that you and your team split up. Send your colleagues towards the passageway located in front of you and make sure to place them behind walls or pillars. You should choose a corridor located to your right and head up the stairs to make your way to a large balcony. It's going to be easy to pick your targets from here. It would be a good idea to start using a grenade launcher or one of other heavy weapons during this battle, mostly because you're also be attacked by armored thugs. Pay close attention to the beasts called varrens, because they will be probably want to get close. The easiest way to eliminate the creatures is to use a shotgun at close range (if you can't have a shotgun consider choosing a submachine gun and use your powers). Winning this battle may become easier if you decide to aim at some of the explosive objects located in the area. Keep attacking your enemies until they're all eliminated and no one else shows up.

Make sure to take your time to examine the battlefield, because you're probably going to need to collect ammunition. Once you're ready find a new door located to your left (first screenshot). Check a new room to locate a container with 250 units of element zero. Proceed to the adjacent room where you'll come across two looters. There are three ways of solving this problem - you can convince them to stop what they're doing (special paragon/renegade dialogue options), you can ignore them or you can kill them. Return to the main room when you're done.

Keep heading forward until you find a passageway with an AUXERA sign. There aren't any other enemies in the vicinity and it won't take long until you get to the clinic. Ignore the first guard and head inside. You can take some time talking to the patients, however the only important thing is to locate a medical station. You can now choose a corridor found to your left.

When you get to the end of the corridor you should first take some time to explore a small warehouse to the left. Collect 2000 units of platinum, a med kit, 2000 units of palladium and interact with a medical station to acquire a new plan for a research project.

You may now proceed to the other room. Start off by looking around - you can take a new med kit, as well as 2000 units of iridium, 500 units of element zero and power cells for your heavy weapons. You may finally talk to doctor Mordin. Notice that there are two ways of stopping his monologue - you can choose a renegade interrupt or you can wait and choose a paragon interrupt. He'll soon give you a chance to ask him a few questions and you should use this opportunity to tell him about your encounter with a wounded batarian. Mordin will give you a M-6 Carnifex pistol and he'll ask you to do two things - deliver a cure to the environmental control system and find his assistant (Omega: The Professor - Missing assistant subquest).

You may now return to the main area of the clinic. If you want to start using the newly acquired pistol or give it to someone from your team you should consider interacting with a nearby ammo locker (first screenshot). Go to your left and approach a newly unlocked passageway (second screenshot).

The next big battle is going to take place in a nearby room and once again you should decide to split up with the rest of your squad. Leave your colleagues somewhere near the entrance to the room and then proceed alone to your right in hopes of surprising enemy troops. Make sure to prevent your enemies from getting too close, especially since some of them will be using shotguns. Don't forget to always focus on attacking armored foes, because they'll pose a serious threat. There are many explosive containers in the room and you can consider shooting at them to inflict additional injuries. Collect ammunition after you've won this battle.

Proceed to the next area of the base. Don't count on this section of the mission to become easy, because you're going to be attacked by new enemies close to the stairs (first screenshot). Place your colleagues near the stairs and behind cover so that they will have a chance to begin attacking enemy units. Once it's finally safe here spend some time looking around. You should be able to find a medical station and a gambling terminal (3000 credits).

You may finally use the stairs to reach an upper floor. Spend some time looking around when you get there, because you should be able to find a new bank terminal (first screenshot). A successful hacking attempt will reward you with 5000 credits. Head on to the next section. Notice a new door to your left and you can head inside if you want to complete Omega: The Professor - Missing assistant quest (read its description in the second chapter of the guide). After you've found the assistant you may proceed to the last door on your right.

Be careful, because as soon as you've opened the door you're going to be attacked by a new group of enemies. It would be a good idea to run towards the left door for a better shooting spot. Once they're gone use the stairs to reach a lower level. I would strongly recommend saving your game here, because you're about to take part in an another long battle.

The most important thing here you'll have to take under consideration are going to be enemies equipped with rocket launchers. They're on the upper balconies, so you won't be allowed to attack them from a close range. The easiest way to get rid of them is to use a sniper rifle. If you can't use this weapon you'll have to rely on your powers and aim at explosive canisters located close to enemy units (Jacob's biotic attacks also may come in handy here). Make sure that your entire team is using cover, because a direct contact with a rocket will inflict serious injuries.

Remaining enemy units will be storming through a large door located beneath your current position and in this case it would be a good idea to use a grenade launcher or a similar heavy weapon which may already be in your possession. If you're lucky enemies won't have a chance to use the stairs to get to you and your team. After you've won take some time to scout the area for ammunition and then proceed towards the only available door (second screenshot).

I would recommend switching weapons here, because you'll want something that's good in close quarters combat. Step through the door and get ready to defend yourself against a group of enemy units (first screenshot). You probably won't have enough time to find cover, so you'll have to defeat them in direct combat. Proceed to a room found to your right (second screenshot) to salvage some parts (1000 credits) and to pick up a med kit. You may head forward.

You should be able to get to a new door eventually (first screenshot). Save your current progress, because it won't be possible for the next few minutes. Entering the room will trigger a cut-scene, however it won't take long until the battle starts. Make sure to choose a good cover for you and your colleagues before enemies will commence their attacks. Sadly you won't be allowed to perform any flanking maneuvers, so you just have to keep pushing forward. Watch out for an enemy equipped with a rocket launcher - kill him as soon as possible and from a safe distance.

Make sure that the area has been secured and then proceed towards a machine which was being defended by the last group of enemy units. Approach a large computer (first screenshot) and press the action key to insert the cure. Order your men to take cover behind the nearest object, because you're soon going to be attacked by a new group of enemies.

The final phase of this mission will require you to activate two fans in order to deliver the cure you've just inserted. Before you'll have a chance to do this you will be forced to defeat several groups of enemies. This time you'll have to pay special attention to snipers - they will ocuupy a nearby balcony and you must defeat them before moving on. Order your colleagues to follow your lead and use a ramp located to your right (second screenshot).

Get ready, because as soon as you get closer to the room with the controls to the first fan you'll notice that a large group of enemy units has appeared directly in front of you. Use one of the nearby pillars for cover and wait for them to come to you. Once they're gone enter the room and locate a control panel (second screenshot). Before you decide to use the panel order your subordinates to take cover near the passageway you've just used. Interacting with the panel will result in yet another battle and you'll have to attack enemies almost right away.

You must now make your way to the opposite end of the room, because that's where you'll find the second control station (first screenshot). This time you shouldn't be stopped by anyone. Once you're inside use the panel and wait to be automatically transported back to the clinic. You can now choose between staying here a little while longer (a chance to collect medi-gel and power cells) and going back to the Normandy. Once you're on board of your ship you'll have a chance to talk to Mordin again and you'll be allowed to use a paragon interrupt to stop his monologue.