Yes, when you knife someone, you get their dog-tags as a reminder. Fun little something extra that you can go "Look I got withing knifing distance of you and you didn't notice haha!", although quite a few of mine are from ninja'ing into their base and stabbing the UAV guy. It's lame that the ones you got during the demo don't count toward the badges. I have like 50 of them, (3 of one guy :grin:) , but the badge only has 37 <_<. And I don't know what is different about bronze and silver ones, maybe when you reach bronze star for the knife you get silver, and so on? My tags from the demo carried over. People start dropping gold dog tags after I believe level 35. I have three golds from the same person :thumbup: I stabbed a level 35 the other day and still got silver tags. Got 223 dog tags atm, been knifing less in games recently.