Cortez is the only child in his family and lost both of his parents years ago. He had a husband named Robert who was stationed at Ferris Fields in 2185, but the Collectors abducted the whole colony and Robert did not escape. While the Collectors were attacking, Robert called Steve, who was working on construction at a remote station not far from the colony, warning him to escape before the Collectors hit his station too. Steve begged Robert to escape with him, but Robert knew it was too late and asked Steve not to come after him, but to let him go and move on. Steve grieves heavily for his husband's death, and kept a recording of their last call.
Five months prior to the Reapers' invasion of Earth, Cortez was assigned to the Normandy SR-2 retrofit team, responsible for overseeing cargo bay modifications. His immediate task was to shift the Normandy's armory from its previous location behind the CIC to the shuttle bay.
Besides being a Kodiak pilot aboard the Normandy SR-2, he is also responsible for maintaining the Normandy's armory, a duty he shares with Lt. James Vega. Cortez and Vega are friends, having served together before on Fehl Prime. In between missions, they engage in off duty conversations.
Cortez prefers to have as little time off from his duties as possible, since any time spent not working gives him too much time to think about Robert. Shepard has the option of convincing Cortez to take time off to leave the ship and succeeds. At first, Steve just loiters near the Normandy's docking bay on the Citadel, but he finds Shepard's suggestion a good idea since the vista of so many ships in flight brings him comfort and gets him thinking. He later visits the Memorial Wall for victims of Collector and Reaper attacks at the refugee docks, where Shepard can once more offer words of support.Admiral Hackett, giving the Alliance some much needed pilots. A further encounter at Purgatory allows a male Shepard to begin a relationship with him, or reinforces their friendship otherwise.
During the final assault on Earth, after dropping off Shepard's squad, Cortez's shuttle is shot down by a Harvester. If he has been persuaded to visit the Memorial Wall, he survives the crash and can be contacted via hologram later.
Steve is later present in front of the Normandy's memorial wall with the rest of Shepard's surviving crew if the Crucible was activated, paying his respects to the dead.
If Steve was never interacted with much, he dies when his shuttle gets shot during the final assault on Earth. He cannot be contacted and James confirms Cortez's death. Much later, if Shepard uses the Crucible, Steve's name is listed in the Normandy's Memorial Wall as Steven Cortez.
Mass Effect 3: Leviathan Edit
During the mission to find Leviathan, the shuttle's systems stop working after it is hit by an energy pulse by Leviathan, forcing Cortez to make a crash landing on one of the shipwrecks. Eventually, Reapers start attacking them and Cortez comes up with a plan for Shepard to reach Leviathan at the bottom of the ocean. He suggests activating a Triton ADS, which Shepard can use to venture underwater. Cortez then provides Shepard with power cells from the shuttle to power up the doors and access the mech.
When Shepard wakes up in the shuttle after meeting the Leviathans, and Shepard's love interest is not in the squad, Cortez will say, "We're lucky we got you back". If he is Shepard's love interest, he will instead scold Shepard, "Never do that again". Back on the Normandy, he tells a romanced Shepard that he wishes he could have gone with him.
Mass Effect 3: Citadel Edit
After Shepard's escape from the first run-in with CAT6, Cortez loiters in the study room of the apartment. He's relieved the Commander got out as none of them expected the attack, so he shares an illuminating lesson learned from the event: "Never have dinner with Joker." If Shepard and Steve are lovers, he admonishes Shepard with another one: "You sneak off to a dinner date with another man, you get shot at."
While Shepard and company fight the Clone to retake the Normandy, Cortez and Joker fly a skycar directly ahead of the Normandy's trajectory, preventing the merc pilot from making the jump to FTL. Cortez utilises the full extent of his piloting skills to evade the Normandy's weapons fire. Once the clone is defeated, Cortez brings a restrained Maya Brooks to Shepard.
After taking back the Normandy from the Clone, Cortez will send Shepard an invitation to the Silversun Strip. Steve picks Shepard up at the appointed location with the Kodiak to go on a joyride. Steve reveals during the ride that he has disabled the inertial dampeners and gives Shepard a taste of flight without mass effect fields, something which was commonplace before the advent of mass effect technology. If they are involved in a romance, Shepard can choose to hold hands and then cuddle in the back of the Kodiak while it flies on autopilot.
Cortez can also be invited up to Shepard's apartment, along with James Vega, before or after the party. He will send an e-mail asking for an invitation, if Shepard has helped him reach a sense of closure on his husband's death. He will wish to watch the biotiball game featuring the Seattle Sorcerers taking on the Usaru Maestros.
Both Cortez and Vega will state their cases for each team to win. Shepard will be asked to back a team. Selecting a particular team will result in the supporter of that team winning the bet (though the Sorcerers always win the game). When Shepard questions this, the winner reveals that the bet was only on whether the Commander would be correct in their pick, rather than who would actually win. After the game, both of them thank Shepard and leave the apartment. If Cortez is romanced, James will tell them to enjoy their evening and leave the two of them to cuddle on the couch.
Cortez can be invited to the party. In the beginning, he hangs out with James, Ashley/Kaidan and Jack (if they're present). Cortez thanks Shepard for throwing the party and bringing everyone together.
If the party setting was chosen to be energetic by Shepard, sometime later, Cortez is at the bar with Joker along with by Garrus, Javik, and Wrex (if they're present). Cortez gets into an argument with Joker regarding their choices of planets most harsh to life. He shows an interest in Prothean fighter craft which he discusses with Javik. At this point, Cortez gets into another argument with Joker regarding the latter's lack of gun training. Cortez insists on taking Joker to the shooting range while Joker insists that he doesn't need to because of EDI. Shepard can either support Joker or Cortez. If Shepard supports Cortez, Joker will agree to go to a gun range to practice, conditional on Cortez beating him in a drinking match. However, Joker's alcoholic concoction (a combination of horsechoker and mouthwash) lead Cortez to surrender. If Shepard supports Joker, the argument ends.
Later, if the party is energetic, Cortez starts dancing with a few friends. He applauds the Commander if they step into dance and comments its nice to see Shepard relaxing once in a while. He is the only person in that group who doesn't tease Shepard about their dancing style.
Steve can be seen on the Normandy's Docking Bay on the Citadel during one of the trips there, taking Shepard's suggestion. Cortez once more doubts the circumstance of his survival, musing it it may have been better to go down fighting with loved ones, though Shepard steers him away from his dark thoughts by pointing out they'd have never met if Steve died. Steve then talks about the Memorial Wall put up by refugees, and considers going there to move on.
Later, he is seen at the Memorial Wall saying goodbye to his late husband. Shepard comforts him, commenting that Steve's past was his and that nobody could take that away. Cortez then thanks Shepard for his encouragement.
While Cortez and Shepard dance, the Commander tells Cortez about his feelings, wanting to be more than friends. In reply, Cortez thought he felt there was something between them but was merely pessimistic about it. Shepard affirms that feeling and kisses Cortez.
Before the final battle on Earth, Shepard can contact a romanced Cortez via hologram after his shuttle crash. Glad he is unhurt, Shepard tells Cortez seeing the shuttle explode was a "feeling I never want to have again." Cortez admits it wasn't one of his finer moments as a shuttle pilot. He tells the Commander with him around, "the impossible doesn't seem that tough," and will be waiting for him after the war.
Steve will be the one to place Commander Shepard's name in the Normandy's memorial wall much later if the Crucible was activated. If the Reapers were destroyed, he refrains from doing so, although otherwise he proceeds and grieves along with the rest of the crew who survived. If organic-synthetic synthesis was achieved, he hugs EDI at the very end.
- According to Dusty Everman, early designs of Cortez gave him a lighter skin color, which was why many of his scenes are darkly lit, as there was not enough time to adjust them to his final skin tone. Casey Hudson picked the final design of the character.
- According to Mark Meer, he recorded many variations for Shepard's reaction to Cortez's death, depending on how much the player interacts with him. However, the game only used the "STEEVE!" recording, which was meant to be only heard if Cortez actually died and Shepard romanced him.