The only reason why I question whether 15 consecutive counter kills is the requirement is because that many counters would require nerves of steel and a number of people seem to encounter the Mercs bosses, lol.from a YT video
seems like it, i'll try later
Also, on the close camera, I want to add it does an admirable job of increasing the tension. Especially because of Agent Hunt: Other players can invade your game as monsters, and because of this even the AI monsters are capable of eventually tracking you from the opposite side of the map, meaning you can loiter at, say, the start of Leon Chapter 2 and after awhile a crypt zombie WILL attack you.
The close camera, and the presence of a constant threat, means you're always looking over your shoulder, scanning your surroundings for danger. I've had more than a couple moments where I was startled by a zombie that had gone the extra mile (literally) to get me.