I had recently played a game online where everybody was running at blazing speeds and jumping higher than all the buildings. I played a couple matches just because it was so strange then all of the sudden, during a match, a loading bar (as if I were planting/defusing a bomb) appeared and it loaded all the challenges onto my account. I then noticed that when I spectated a certain person I could see all these menus he was navigating and one talked about infection mods. How does somebody get access to all of that? What did he have to do to be able to do that with his account?