Hey, I've now finished the game on casual (without paying attention to reports and kilroys) and now I am playing the game again to find them. Reports appear as an "extra" (chapters menu), but what about kilroys? Do they unlock a "bonus" or something alike? I know that in the XBOX version we unlock an "achievement" but in the PC version they are apparently useless.

Anyone?

Kilroys do nothing except to say you found them. They just give you a reason to explore the map to a greater degree than you would have otherwise.

OK. Thanks. It would have been better to give kilroys a reason for their existance in the game anyway.

Apart from that reason, of course.