Priority: Perseus Veil / Geth Dreadnought

(Priority) Perseus Veil / Geth Dreadnought

Unlockable Weapons and Equipment:
Arc Pistol
Archon Visor
Geth Pulse Rifle (Assault Rifle)

Weapon Upgrades
Shotgun Smart Choke
Sniper Rifle Enhanced Scope
SMG Scope
Assault Rifle Precision scope

Walk to the airlock until you successfully enter the dreadnought. Upon entry, check the console to your left to find a Shotgun Smart Choke beside it.

Use the ladder to go up then jump over to the other side to reach the door. In the next room, examine the console along the long walkway to get some geth data. Use the nearby ladder again then activate the docking controls. Grab the Arc Pistol then continue to the new path.

Grab the GARDIAN data and Sniper Rifle Enhanced Scope on the console along the way. Move along and activate the bridge controls. Destroy the enemies then take the ladder down. Fight your way along the corridor then finally grab the geth data on the console before the exit to earn some credits. Exit through the door.

Once there, examine the consoles and grab the Archon Visor. Move to the next area, then grab the Geth Pulse Rifle on top of a crate on the wall to the right before moving forth.

Clear the operations room then head to the consoles. Grab the SMG Scope and geth data before activating the main console. Take out the geth reinforcements that'll come your way then use the door where they came from.

Continue following the path and go down the ladders until you reach the next door. Grab the geth data and med-kit along the way as well. Continue until you reach the main battery. This will release shockwaves from time to time and will complete take out your shield if you're caught in it. Just move from cover to cover and dig in when a shockwave is approaching your way. Force your way through until you find the maintenance console. Deactivate it.

Run to the walkway before the gun fully activates. You have to do the same thing; fight your way to the next door while occasionally taking cover from the shockwaves. Bypass the door then grab the Geth data in the console behind the platform control before activating it.  Activate the platform control then continue to the drive core.

After talking to Legion, grab the geth data from a console nearby and a Assault Rifle Precision scope. Once ready, head to the upper platform and deactivate the hardware blocks.

Once done, fight your way through the other side of the platform then use the ladder to go down. You don't have to do anything else here but to run. Continue running until you reach the fighter to escape.