(Priority) Rannoch

(Priority) Rannoch

Unlockable Weapons and Equipment:
Kassa Fabrication Gauntlets
Geth Plasma Shotgun

Weapon Upgrades
SMG High Caliber Barrel
Assault Rifle Piercing Mod
SMG Ultralight Materials
Assault Rifle Stability Damper

After landing, take cover and take out the geth below. Continue downhill and take out more enemies. The door will be locked before you so you have no choice but to climb manually. You'll also find a SMG High Caliber Barrel on the ground near the closed gate.

Use the pipes and crates to vault over and reach the upper platforms. You'll find an Assault Rifle Piercing Mod on the platform in the middle. You'll also find a Kassa Fabrication Gauntlet near the stairs.

Continue to the next platform then fight your way until you reach the door. Exit to the next area then check the path to the left to find SMG Ultralight Materials. Continue along the main road and destroy all geth enemies. You should also find an Assault Rifle Stability Damper on the floor along the way.

Continue forth and you should find a Geth Plasma Shotgun right beside the ammo/grenade cache before reaching the door. You should salvage the data from the console as well for some credits.

Enter the door and press forward. You should find a med-kit and salvageable data along the way. Move outside and kill more enemies. Move to the door override then dig in and defend your position. After clearing the area, head to the marked console and activate it. Head to the elevator and destroy the prime that's blocking it. Activate the elevator to reach the upper levels once done.

There will be three geth primes here. Make sure to move around and take cover while throwing everything you have against them. If possible, try to concentrate your fire on them. Do not stay together as this will certainly spell your doom. Just spread out, revive your allies as needed and unleash your powers and grenades as necessary.

If you want to do this the easy way, there are some Geth Spitfires you can find scattered around this area. Use this to quickly kill the primes.

Geth Prime Party

Once clear, head to the far end of the walkway and use the targeting laser to paint the target. After the scene, run to the hovercraft. After the scene, you'll have to manually target the reaper. Take note that you need to move side to side to avoid getting hit.

Concentrated fire

After the scene, you'll have to decide whether to destroy the Geth or support the quarians. If you have Tali and if your paragon level is high enough, it is possible to get both forces join you into battle. To do this, you must select the option to upload the Reaper codes to the Geth, and then choose the second paragon option.