The last Normandy upgrade is a Med Bay upgrade that grants Shepard access to plastic surgery. These are lower priority and can be researched at a player’s discretion.
The upgrade name, mineral cost, and the squadmate who suggests it, appear below: These are the three Normandy upgrades Shepard should research and purchase first. Failure to get any one of these upgrades before going through the Relay will result in a squadmate’s death before the infiltration of the Collector Base, usually regardless of their Loyalty to Shepard. There are three critical upgrades Shepard must make if they want every squadmate to survive the trip through the Omega 4 Relay. If not, they can exit the interface and the conversation with the squadmate and access the upgrade again later from the terminal in the Tech Lab. If they have enough materials, they can purchase the upgrade on the spot. Players can choose Ship Upgrades to see all the available options. After a brief bit of dialogue, this will automatically open the upgrade interface from the Tech Lab. Then, Shepard need to find the squadmate aboard the Normandy between missions and use the Investigate dialogue option, followed by. Recruiting Mordin opens the Tech Lab on the Normandy, allowing Shepard to begin researching all upgrades.
To ask squadmates about potential upgrades, Shepard will first need to find and recruit Mordin Solus on Omega. At first, they will only have access to Jacob’s, Miranda’s, and Mordin’s suggestions, gradually unlocking more as they complete main story missions. The order in which Shepard unlocks Normandy upgrades in Mass Effect 2 will depend in part upon the order in which they recruit squadmates from The Illusive Man’s Dossiers.