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Mass Effect 3 Priority: Mars Armor
Kassa Fabrication Chestplate: As you make your way along the roof of the base, look for this upgrade to the left of a ladder you’ll need to climb.
Mass Effect 3 Priority: Palaven Armor
Armax Arsenal Shoulder Guard: In the pod with a weapons bench, adjacent to the General’s.
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Hahne-Kedar Greaves: In the pod to your right as you’re leaving the turian camp for the communication tower.
Mass Effect 3 Grissom Academy Armor
Mnemonic Visor: Continue past where you can find the Mattock near two orange benches and turn left. On a bench, near a kneeling student, you’ll find this visor.
Serrice Council Chestplate: In the room after the one in which you found the amp schematics, hop over the flaming bench section and look to your left. This chestplate is on a bench against the wall.
Mass Effect 3 Priority: Sur'Kesh Armor
Armax Arsenal Greaves: You’ll enter a room with multiple levels where a varren attacks one of your enemies. Stay on the lower level and walk forward to the desk to find these greaves.
Sentry Interface: Walk past where you found the greaves, and beyond the ladder leading to the upper level. Eventually you’ll see this on a bench.
Mass Effect 3 Attican Traverse: Krogan Team Armor
Ariake Technologies Shoulder Guard: As you move through the tunnels, look for this small waterfall located just beyond one of the gestation pod groups. Check the ground nearby for the shoulder guards.
Mass Effect 3 N7: Cerberus Attack Armor
Armax Arsenal Gauntlets: If you assume the control console is at the northern part of the area, then go to the northwest corner. You’ll find these on the ground there.
Mass Effect 3 Tuchanka: Extract Turian Survivors Armor
Hahne-Kedar Chestplate: Soon after your second fight with the harvester, your team will lead you to a small drop-off. Drop down and continue forward, hopping over the short barrier. There, on the left, you’ll find this armor.
Mass Effect 3 Tuchanka: Bomb Armor
Rosenkov Materials Gauntlets: Just after finding the Incisor following the opening fight and heading up a narrow slope, you’ll be involved in a firefight in a long, corridor-like section. After the area is clear, stick to the right and go to the far wall to find these on the ground.
Mass Effect 3 N7: Cerberus Abductions Armor
Capacitor Helmet: This is easy to miss. Look for the numbers and the dumpster in the image above. The helmet is on the ground to the right of the dumpster.
Mass Effect 3 Priority: Tuchanka Armor
Death Mask: Once you’re on the ground for the second time during this mission, look to your right. There’s a krogan working on a truck wheel; the mask is on the ground to his left.
Mass Effect 3 Priority: The Citadel Armor
Recon Hood: On your way to the executor’s office, check the left side of this room under the screen for the recon hood.
Securitel Helmet: In the last room on the left, just left of the M-25 Hornet SMG.
Mass Effect 3 Arrae: Ex-Cerberus Scientists Armor
Kassa Fabrication Greaves: After the initial fight, you’ll be inside the facility. Enter the infirmary and immediately turn right to find these greaves on a crate.
Mass Effect 3 Lesuss: Investigate Asari Colony Armor
Serrice Council Shoulder Guards: After meeting one of the Ardat-Yakshi and having a short conversation, take out the cannibals in the next room, then look for a smaller office to the right. It's to the right of the Disciple Shotgun, on a desk.
Mass Effect 3 Priority: Geth Dreadnought Armor
Archon Visor: As you make your way through the dreadnought, you’ll find yourself in this corridor. Check the right-hand side to find this visor near one of the consoles.
Mass Effect 3 N7: Fuel Reactors Armor
Rosenkov Materials Chestplate: As soon as you have control of your character, turn left. Several meters in front of you, on a crate, lies this chestplate.
Mass Effect 3 Rannoch: Admiral Koris Armor
Armax Arsenal Chestplate: If, when you have the choice between two different AA control panels to go after, you choose the right panel, this upgrade is only a few feet from it. Don’t worry if you choose the left panel first; you will have to deactivate both.
Mass Effect 3 Priority: Rannoch Armor
Kassa Fabrications Gauntlets: On your way to the upper entrance, you’ll see this on the ground near one of the ladders. It’s hard to miss.
Mass Effect 3 Priority: Thessia Armor
Umbra Visor: As soon as you step of the shuttle, move forward to the ammo boxes at the center of the courtyard. The visor is on the ground next to the ammo.
Mass Effect 3 N7: Communication Hub Armor
Ariake Technologies Greaves: You can find these at ground level once the mission begins. Clear the area of enemies, then look for this concrete column, which serves as support for one of the massive dishes. The greaves are on the ground behind it.
Mass Effect 3 Priority: Horizon Armor
Rosenkov Materials Shoulder Guards: After draining the water, you will enter the secret facility. Just before passing through the second door, look for these shoulder guards to the left. If you don’t have this by the time you reach the ladder, turn back.
Mass Effect 3 Priority: Cerberus Headquarters Armor
Serrice Council Greaves: Immediately after watching the first set of the Illusive Man’s video logs, turn around.
Delumcore Overlay: Soon after you watch the second set of the Illusive Man’s video logs, you’ll see this blue-tinted hole to your left. Instead of jumping down to proceed, head past it and into the room on the right. Inside, behind some crates, you’ll find this overlay.
Congratulations – you've found every piece of Mass Effect 3 armor.
