Mass Effect 2: Upgrade Locations

Assault Rifle Damage (5)
Each level increases Assault Rifle Damage by 10%


 * In the quarantine area on Omega, just after a barricade of mercs.
 * Sold on Ilium at Gateway Personal Defense.
 * During Zaeed's loyalty mission on Zorya, on a computer, but only by sacrificing the workers (have to choose between Heavy Weapon Ammo and Assault Rifle Damage).
 * Sold on Tuchanka at Fortack's Database.
 * On Tali's recruitment mission on Haestrom, in the room blocked by the collapsed pillar.
 * During Samara's loyalty mission, on the wall in Morinth's apartment.

Biotic Damage (5)
Each level increases Biotic Damage by 10%
 * On Horizon world on a dead collector when you first meet a Scion, after finding Delan (easily missed).
 * During Samara's recruitment mission in the small room with Elnora, the asari hiding behind the desk.
 * Sold on Tuchanka at Fortack's Database.
 * Sold on Illium at Serrice Technology.
 * On Pragia during Jack's loyalty mission, on a hackable computer right before fighting Kureck.

Damage Protection (5)

 * On Purgatory in a destroyed YMIR mech right after freeing Jack.
 * Sold on the Citadel at Saronis Applications.
 * During Collector Ship Mission on a research terminal before encountering any collectors.
 * Reward for N7: Anomalous Weather Detected on Canalus (Dirada System, Pylos Nebula).
 * Sold on Illium at Gateway Personal Defense. Does not sell it until after Collector Ship mission.

Geth Shield Strength (2)
Each level increases shields by 25% on party members equipped with geth shielding
 * On a computer during Tali's loyalty mission, just after the first room.
 * During Legion's loyalty mission on a geth terminal. Found in a room sparking the conversation about the size of the ship.
 * Sometimes rewarded after Normandy Crash Site (DLC only), however appears to be a bug and does not show up.

Heavy Skin Weave (5)

 * Sold on Omega at Kenn's Salvage.
 * On a dead collector on Horizon, just after first seeing husks, before examining dead Husk. If you examined husk, you are too late and won't be able to go back.
 * Sold on Illium at Gateway Personal Defense.
 * On the Derelict Reaper ship in a computer after fighting your first Scion of the level.
 * On an N7 mission: N7: MSV Strontium Mule (Arinlarkan System, Omega Nebula). Located at the end of the mission on a hackable terminal with the payload.

Heavy Pistol Damage (5)
Each level increases Heavy Pistol Damage by 10%
 * Sold on the Citadel at Rodam Expeditions.
 * Sold on Tuchanka at Fortack's Database.
 * On Tali's recruitment mission on Haestrom, at the bottom of a stairwell at the first fight with the geth (easily missed).
 * On the Citadel during Thane's loyalty mission, immediately at the beginning on the 800 Wards on a datapad.
 * On Aeia during Jacob's loyalty mission, just after the barricade is destroyed with the rigged mech.

Heavy Weapon Ammo (6)
Each level increases Heavy Weapon Ammo capacity by 15%
 * On Freedom's Progress on the dead YMIR mech just outside Veetor's shack.
 * Sold on Omega at Kenn's Salvage.
 * Sold on Tuchanka at Ratch's.
 * During Mordin's mission on a hackable research terminal after the boss.
 * During Zaeed's loyalty mission by the fire extinguisher controls, only if trying to save workers (have to choose between Heavy Weapon Ammo and Assault Rifle Damage).
 * Reward for N7: Blood Pack Base (Shrike Abyssal, Xe Cha System, Planet Zada Ban)
 * Reward for N7: Blood Pack Communications Relay

Krogan Vitality (2)
Each level increases Health by 25% on krogan party members
 * On Korlus in the same room you find Warlord Okeer.
 * On Tuchanka during Mordin's loyalty mission, in the same room as the dead female Krogan.

Medi-Gel Capacity (5)
Each level increases Medi-Gel Capacity by 1
 * Complete Dr Chakwas' side mission (Serrice Ice Brandy).
 * On Omega, inside Mordin's clinic in the quarantine zone.
 * Sold at Sirta Foundation on the Citadel.
 * Sold on Illium at Serrice Technology.
 * On Illium at during Miranda's loyalty mission on a dead merc after the first elevator ride and sub-machine gun upgrade (easily missed).

Sniper Rifle Damage (5)
Each level increases Sniper Rifle Damage by 10%


 * Sold on Omega at Omega Market.
 * On Korlus at the top of the stair case after the waves of Krogans.
 * On the Citadel during Garrus' loyalty mission, in a hackable terminal just before raising the shutters.
 * Sold at Rodam Expeditions on the Citadel.
 * On the Derelict Reaper ship at the end of a long catwalk where Legion snipes some husks.

Shotgun Damage (5)
Each level increases Shotgun Damage by 10%


 * Sold on Omega at Kenn's Salvage.
 * On Purgatory on a dead guard right after destroying the first large mech.
 * Sold on Tuchanka at Fortack's Database.
 * After Grunt's loyalty mission, awarded by the shaman automatically.
 * On the Derelict Reaper ship in the middle of a bunch of Scion and husk fights.

Submachine Gun Damage (5)
Each level increases Submachine Gun Damage by 10%


 * On Omega, right before the assault on Archangel. There is a door you have to bypass close to the gunship (easily missed).


 * Sold on the Citadel at Rodam Expeditions.
 * Sold on Ilium at Gateway Personal Defense.
 * During Thane's recruitment mission, just before the windy bridge.
 * On Ilium during Miranda's loyalty mission. Found in a shipping container after riding the first elevator.

Tech Damage (5)
Each level increases Tech Damage by 10%
 * Sold at Saronis Applications on the Citadel.
 * On the main floor of Archangel's house during the assault.
 * Sold on Illium at Serrice Technology, does not show up until after Collector Ship mission.
 * During Collector Ship Mission, after fighting the Praetorian.
 * After Tali's loyalty mission, awarded after trial if Tali is found innocent either through Paragon/Renegade scores or by handing over evidence (and losing Tali's loyalty permanently).
 * Sometimes rewarded after Normandy Crash Site (DLC only), however appears to be a bug and does not show up.