Unlocked Dirty Dozen (kill 12 without dying) and wondered if they were any more medals or awards that were rare or difficult? Got invinicble too, but that isn't too hard seeing as you could always just hide underwater on Pier 17 or somewhere if you really wanted to.

I'm assuming there's some tough hidden ones though. I tried killing someone with a car, but no luck yet. Does anyone know if that gives you one?

Pretty sure the car one is only challenges. There are some hard ones related to game types like the alienated and i think technomancer. Dirty dozen isn't a hard one though. The ratio one just started registering today so maybe that one. Most kills with c4 is one. Icy which is most distance slid isn't hard but most people don't have it.

Ahh, well I only bought the game today and got the ratio one first game using my tightly honed demo skills.

I'd say dirty dozen is harder though, as generall if you get 12 kills without dying, you're almost certainly going to get the highest K/D too, but not vice versa.

Genocide never unlocks for me even though I kill the entire enemy team every other game (I check) Guess it's giving some crappier ones priority for some reason.

I have the 10 MVP one too, and if that scales (MVP x 100, or even 1000....) that'd be tough.

Good resource here that details what you have to do to get all award and medal dog tags.

Skill kills are the ones where you get bonus XP and count towards an achievement, but don't unlock dog tags. (I think there are 30 of them) So far the only two I haven't got are Road Rage (Kill someone by power kicking a car) and Psycho (kill 5 enemies in quick succession)

EDIT: Got my first Road Rage today! It was epic - was chased by a guy around a car on Parking Deck with a K-Volt, had to wait until my energy started charging, then boom! His body flew clean off the roof!