Obtain 10 technology upgrades
Once you have recruited Mordin, you can complete Research Projects at the station in the Tech Lab. Go to the weapons and it will show you what upgrades you can make. You will find these upgrades during missions, which will then be available to create.
You will find upgrades lying around missions, and you can purchase upgrades on Omega, The Citadel, Illium and Tuchanka. Obtain any assortment of 10 tech upgrades to unlock the achievement.
Note: Purchased upgrades will directly count; you don’t need to research them, unlike the ones you pick up.
Harrot’s Emporium - Omega - Predictive Display
Saronis Applications - The Citadel - Microcore Amplifier, Ablative VI
Cirta Foundation - The Citadel - Microscanner
Serrice Technology - Illium - Hyper Amp, Quantum Threading, Microscanner
Gateway Personal Defense - Illium - Lattice Shuntting
Fortack’s Database - Tuchanka - Hyper Amp
See "Weapon Special" for a list of purchasable weapon upgrades, which also count towards this achievement.