Lair of the Shadow Broker

After clearing out Horizon and making your way to Illuim you will be able to access the Shadow Broker mission. Meet with Liara in her office and provide her with the info provided by Cerberus. Next, move to the taxi port on the other end of Illium and head for Liara's apartment.

You'll arrive at the apartment but find it in ruin. Liara is missing and the police are investigating the scene. They are also supported by an Asari Spectre named Vasir. Check the various items and relics around the apartment and you'll discover that Liara was headed for the Baria Frontiers in the Dracon Trade Center.

Trade Center

While the Trade Center will be quite at first, upon entering a huge explosion will take out three floors. Vasir will take to the top level in a sky car while you and the squad enter from the bottom. The first few floors will be clear, but soon you'll skirmish with a few Shadow Broker Agents, Engineers and Heavies. They tend to use flashbangs and send out combat drones to distract you.

The fights themselves are very taxing, so move ahead and you'll soon find Vasir taking down a few of the Agents. Liara will appear and inform you that Vasir is the one trying to kill her. Vasir will make an escape and you'll need to pursue her. Take down the wave of Agents and Heavies that aid Vasir's escape. Vasir will make it to her skycar and you'll team with Liara to give chase.

Sky Way

Keep on Vasir and avoid on coming traffic. If she manages to escape the mission will fail. Her car can aslo launch bombs, while you have no such weapons. You'll simply have to dodge and use the boosters to keep on the Spectre's tail. With enough persistence, you'll force her to crash to the roofs below.

You'll need to do battle with more Heavies and Engineers. Make sue of Stasis, Singularity and Overload to take down the enmeis fast. The Shadow Broker Agents will arrive via aircraft, and are vulnerable while still on the vehicle. Use this time to take them out with heavy weapons or powers before they can attack.

You'll finally corner Vasir who will take a hostage and you can use your Paragon or Renegade to get them free. You can aslo surrender any stored power cells or simply harm the hostage. Either way, you will now do battle with Vasir and a number of rocket drones.

Vasir tends to move rapidly with charge and is deadly with her guns. Using Statis is an easy means of stopping her and taking down her barrier. You can slo make use of Throw and Singularity to keep her off her toes. Finally, be sure to often use your class' special powers such as cloaking to remain safe.

After the battle you'll learn the Shadow Broker's location: Hagalaz. You can also have some time to reminisce with Liara about old times. If you have a past relationship with Liara you can bring up the subject, though it might not go over well if you have a new romance option.

Hagalaz

Once again you'll be teamed with Liara and a second squad mate. It's better to select someone that doesn't use Biotics, as Liara has that field perfectly covered. You'll be moving across the exterior of the ship and will need to find an entrance.

You'll need to deal with drones, mechs and Agents. Ypu can use Biotics to throw enemies off the ship, instantly killing them. Also shooting the capacitors will cause a burst of energy, harming nearby enemies.

You'll coem to a lightning rod that can be lowered with the nearby controls. This will summon more guards, but there is good cover to keep them at bay. Afterwards head to the engine's interior and take out the Mechs inside. Make your way across the catwalk and you'll emerge on the other side of the ship.

You'll face off against even more enemies on this side, including powerful Asair Vanguards and Engineers. Eventually you'll come to a door that Liara will hack into. However, this will signal even more enemies. Use Biotic and other powers to instantly send them into space. They will eventually come from the rear, so take cover on the other side. The enemies tend to use missiles so be on alert. Once again abuse powers and the capacitors to clear the enemies.

After killing the guards, enter the ship itself. You'll fight more enemies and meet with Liara's partner, Feron. He is trapped and the device he is in cannot be disabled. Continue on and take down the remaining enemies, leading you to the Shadow Broker himself.

Shadow Broker

The Shadow Broker will knock out your third squad member, so it will become a two on one battle. The Broker has powerful shields and tends to use melee attacks and charges. Use your own melee skills to take down his defenses and stun for a few seconds. Liara will be a good distraction, but it will be your task to deal the brunt of the damage. You'll need to repeat the pattern of breaking the Broker's shields three times before he dies for good.

Afterwards, Liara will take the mantle of the Shadow Broker. You can return to her at anytime to find out information about your squad members and gain free upgrades. You can also ask Liara to visit the Normandy and rekindle your romance, if you had a previous relationship with her.