This one wasn't written for a prompt, I'd just finished Lair of the Shadow Broker and I couldn't not do something with the information in Legion's dossier.
Mild spoiler for Lair of the Shadow Broker.
Combat Tactics
Dylan Shepard wasn't one to panic. He wasn't one to be subtle about problems, either. "I'm down!"
"We will render assistance momentarily." If nothing else, Legion's calm, not-quite-monotone in the face of what stressed out someone like Shepard was comforting. True to their word, they began navigating a path towards their fallen comrade.
"I'm bleeding out," Dylan was speaking through gritted teeth, his hands clammy, fingers held tightly around-
Legion interrupted his desperation with, "We calculate an acceptable margin for error in our efforts."
"Great." Sighing, Dylan leaned back and stretched his legs out, momentarily letting go of the game controller in his hands to crack his knuckles. How was it that Legion, a hive-mind made from a conglomeration of many from a software-based machine species, enjoyed these things, anyway? "Why is this more stressful than reality?"
Watching their extremely large turian character lean over the skinny, smart-ass human Shepard was playing as to inject the unrealistically-effective medigel, Legion added, "We believe your experience in actual combat tactics inhibits your gameplay, Shepard-Commander. To put it another way, you expect too much realism."
"No," Dylan sighed, quickly getting a decent grip on his gamepad again, "I've always been terrible at this. That's why I played basketball in high-school, it was the only thing I could do better than the other kids." Taking this thought to its logical conclusion, Dylan realized why they were playing Alliance of Two instead of N7 Code of Honor; Legion would absolutely destroy him in anything that was competitive instead of cooperative. "I bet you get accused of cheating a lot in deathmatch."
Pausing as their turian avatar gunned down the last crazy batarian terrorist in the room they were in, Legion said, "We prefer capture-the-flag." Another pause, the fins on Legion's head standing up halfway, before they added, "It provides a pre-determined area suitable for precision rifles."
Noting that the turian character's rifle was, unrealistically, the same model Legion actually used in reality, Dylan glanced at his character's basic assault rifle.
With a frown, Shepard said, "Camper."