Therum: Find Liara T'Soni

1. Drop Zone & Outpost Gate

When you drop into the M35 Mako onto the volcanic path, drive north while geth dropships deploy hostiles, then pull up to the barricade at the first industrial outpost. Head up the side ramp under the scaffolding to reach the elevated gate control building stairs, then activate the Gate Control console to open the way. Before heading back down to your vehicle, search inside this control booth next to the switch to open the Weapon Locker via Decryption and grab Medi-Gel from the Aid Station.

Tip: Engage geth synthetics from maximum distance with the Mako's cannon and machine gun, tapping your jump thrusters to hop over incoming siege plasma bolts from Armatures and the Colossus.

2. Upper Canyons to the Rock Squeeze

Return to the Mako and drive through the upper ridges, navigating the switchbacks and fortified mining tunnels carved into the cliffs. Push through until you reach a narrow canyon choke point flanked by boulders and sulfur vents known as the Rock Squeeze. The impassable path forces you and your squad to disembark and continue the rest of the journey on foot.

Tip: Keep your distance from Heavy Turrets during the drive, as their fire easily bypasses standard cover.

3. Excavation Camp Breach

Move on foot into the mining camp surface area and immediately dive behind low industrial barriers to survive a brutal ambush by geth infantry and an Armature. Once the defenders are destroyed, scour the worker tents and prefabs right outside the dig site tunnel entrance to claim the Technician Kit, Upgrade Kit, and Medical Station. Head through the mine tunnel opening once you have cleared the area.

Tip: Cast Sabotage to overheat enemy weapons, use AI Hacking on Rocket Troopers to draw fire away from the Armature, and deploy Lift or Singularity to immobilize wall-climbing Stalkers.

4. Dig Site Descent

Proceed along the catwalks of the staging area inside the dig site shaft, eliminating the geth units holding the ledges. Ride the main industrial service elevator down to the mid-level landing platforms, clearing out flanking enemies as you advance. While exploring this intermediate platform level, use Electronics and Decryption to crack open both the Storage Locker and the Wall Safe.

Tip: Assault Drones are immune to biotics, so prioritize burning them down quickly with tech powers like Overload and Sabotage while sniping distant Shock Troopers across the pit.

5. Liara's Chamber & Mining Laser

Advance to the observation platform overlooking the energy barrier to locate and speak with the trapped Dr. Liara T'Soni. Walk down the spiraling access ramp to the bottom floor of the ruins, defeat the geth forces guarding the area, and inspect the worker tents near the laser control terminal to loot the Weapon Locker, Crates, and Aid Station. Interact with the Mining Laser Controls console and enter the manual override sequence to blast a hole through the floor underneath Liara's containment field.

Tip: Console inputs for the override are Cross, Square, Circle, Triangle, Square on PlayStation, or A, X, B, Y, X on Xbox, while PC players must complete a 4-to-5 button Simon-says mini-game where correct inputs light green and mistakes show red.

6. Release and Escape

Ride the maintenance elevator up into the bubble and interact with the console to release Dr. Liara T'Soni from her trap. Take the elevator back up to the upper ruins, where you are confronted by a hostile Krogan Battlemaster demanding her surrender; choose any response, as all dialogue prompts trigger an immediate battle. Defeat the Battlemaster and his geth escorts, then make a rapid extraction to the Normandy before the entire ruin collapses.

Tip: Cast Lift, Stasis, or Neural Shock to interrupt the Battlemaster's deadly shotgun charges, and apply Toxic or Incendiary ammunition to halt his health regeneration when he triggers Immunity.

The short version

What matters

• Rescuing Liara early in your playthrough allows you to recruit her for the majority of the game, unlock unique story interactions during Matriarch Benezia's confrontation on Noveria, and start her romance.
• Using crowd-control biotics and Incendiary or Toxic ammunition against the final Krogan Battlemaster to counter his Immunity regeneration and lethal close-range shotgun attacks.
• Opening all ten regional crates, lockers, and stations across the outposts and dig platforms before leaving, as the planet cannot be revisited.

Common mistakes

• Postponing Therum until after Feros, Noveria, and Virmire; arriving this late causes Liara to suffer paranoid hallucinations thinking you are an illusion of Saren, completely locking out her romance subplot.
• Trying to trade shots with geth Armatures and Colossi at close range while driving the Mako instead of utilizing jump thrusters to hop over their slow-moving siege plasma balls.
• Relying on biotics against geth Assault Drones in the interior mine catwalks; these units are immune to biotic talents, requiring tech abilities like Sabotage or Overload instead.