Overall, I think this is a pretty decent piece. You do a good job setting the mood through description and word choice without delving too much into purple prose.

One of my problems with the story is almost all of it is told to the audience rather than shown. I personally would have preferred to actually see Lothar's final fight and recruitment first-hand, rather than through a narrative flashback. The story just feels a bit dry as it stands.

The other big issue I had was with the ultimate act of recruitment. As far as I understand, PPC agents don't just swing through continuums looking for ordinary people to recruit. Most agents that I've seen were either rescued from badfic or fell through naturally-occuring plot holes. I'm sure there are a few exceptions scattered throughout PPC history, but this instance just seemed a bit odd to me. What made Lothar so exceptional as to warrant rescue?

A bit more explanation would have been appreciated, too. Helghast go through massive amounts of propaganda indoctrination, if the games are any judge. How was Lothar able to shake off his programming so easily?

Other than that, I just had some little nitpicks. You mix up your tenses in a few spots ("have" and "had" seemed to be the most common in this regard.) There's also a few redundant moments here and there ("Like his brethren, he was armed and clad in the same fashion of his kin," for example.) Finally, the developer of Killzone is Guerrilla Games, not Gurrilla.

I look forward to seeing your next installments.