Mission 1 S.S.D.D.
After completing the tutorial, you will head into the pit. Shepard will be in the tower to your left, watching you run the course. Simply aim at him and shoot, he is the only "friendly" that you can shoot in this area.
Here is a video guide with English commentary!
Here is a playlist of guides for this game!https://www.youtube.com/playlist?list=PL-HeW6XkKdUK97oYVSMU7...