Sprint to the next turret, open it, then take cover and let the turrets do their job. There is a third turret a bit further from the second. The turret across from the first requires an average Electronics skill to open, or it can be bypassed at the cost of 20 Omni-gel. Sprint towards the first Citadel Defense Turret up ahead and open it using the control at its base. A geth dropship enters the area and drops a number of geth troops. Take out the geth troopers and snipers in the first section and then make your way to the next. Move up to the Exhaust Plain, which is fronted by a mass of kinetic barriers. Use your squad's strongest abilities and pound the warlord with gunfire to bring him down quickly. Keep your distance from the krogan because he is prone to charge. Proceed with caution as this section is occupied by a powerful krogan warlord. Fight your way to the opposite end of the corridor and head up the ramp to reach the upper area.
The tunnel quickly fills with geth as a tram car rams into its side. Move down into the Maintenance Shaft once you regain control of Shepard. Kill the husks nearby and then ride the elevator to trigger a cutscene.
Make your way to the elevator at the other end of the walkway. This is it, the final battle! There's no turning back now!
