Got that one for trading Fist of Havoc kills with another titan.
http://imgur.com/R6g6xyx

-Disciple

It's either stopping a Super before they kill anyone, or stopping it with your own (More likely the latter).

-Disciple

Here are some that I've seen...

Quick Strike-
Get a kill within the first 15 seconds of a match.

Is this not First Blood (first kill of the game)?

I've gotten this one after seeing someone else pop up on the kill feed first.

Interesting. So does that mean there IS no more First Blood medal?

It would certainly be preferable if the bounties changed to needing a Quick Strike instead of First Blood.

Here are some that I've seen...

Quick Strike-
Get a kill within the first 15 seconds of a match.

Is this not First Blood (first kill of the game)?

I've gotten this one after seeing someone else pop up on the kill feed first.

Interesting. So does that mean there IS no more First Blood medal?

Barricade Breaker - Kill the titan behind their barricade? I saw this on Cruel's video, he ran through the barricade & punched the guardian down.

I assume it's killing them while they are standing in their own Rift.

Here are some that I've seen...

Quick Strike-
Get a kill within the first 15 seconds of a match.

Is this not First Blood (first kill of the game)?

I've gotten this one after seeing someone else pop up on the kill feed first.

-Disciple

Here are some that I've seen...

Quick Strike-
Get a kill within the first 15 seconds of a match.

Is this not First Blood (first kill of the game)?

Ruthless-
Kill the same person three times (in one life?).

Pretty sure it's just a renamed Merciless (5 kills without a death), actually.

Undefeated (Gold medal)-
Complete a match with at least ten kills and no deaths.

Are you sure there's a ten kill minimum? I'm pretty sure this popped up the other night, but the best I've gone is 9-0.

-Disciple

Blood for blood - I think it's for trading kills. The net code flaws have medals now.

lol - I think it's just a renamed 'Payback' medal. (I got one right after respawning and killing the guy who killed me.) Would be funny if you were right, though. ;)

I figured the "Best served cold" was the payback medal since I was getting revenge.

I've noticed "Blood for Blood" pop up when I've avenged a fallen teammate.

Oops, right, my bad. Avenger.

Cold Fusion-
Get three kills with a Line Fusion Rifle (or just a Fusion Rifle?)

Can confirm, definitely works with regular fusion rifles as well

Quick Strike-
Get a kill within the first 15 seconds of a match.

Ruthless-
Kill the same person three times (in one life?).

Combined Fire-
An enemy succumbed to fire from you and a teammate.

Blood For Blood-
Avenge a teammate that's just been killed.

I Live Here Now-
Get a Kill while standing on or near a point (But I have seen it pop up when no enemies were killed, so it might just mean that you hold a certain point for a certain amount of time).

Unyielding-
Get a 10 kill streak.

Dodge this-
Kill a Hunter while they're Dodging.

Power Overwhelming (Gold Medal)-
Have double the enemy's score when you hit 50, or Mercy is called.

Dominant Advantage-
Hold a majority of the zones for a period of time.

Cold Fusion-
Get three kills with a Line Fusion Rifle (or just a Fusion Rifle?)

Lethal Cadence-
Get Five Kills with a Pulse Rifle.

Flagbearer-
Win a control match.

Fight Me!-
Get the most weapon kills in a match.

Undefeated (Gold medal)-
Complete a match with at least ten kills and no deaths.

Never in Doubt-
Hold the lead for the entire match.

Blood for blood - I think it's for trading kills. The net code flaws have medals now.

lol - I think it's just a renamed 'Payback' medal. (I got one right after respawning and killing the guy who killed me.) Would be funny if you were right, though. ;)

I figured the "Best served cold" was the payback medal since I was getting revenge.

I've noticed "Blood for Blood" pop up when I've avenged a fallen teammate.

In Cold Blood - seems to be a revenge kill?

I think Cold Blood might be a revenge kill a significant amount of time after being killed. I agree with Claude that I believe Blood for Blood is a revenge medal.

I don't think it's a revenge medal, but an avenging medal. I've gotten it for killing someone who just killed a teammate. Not sure if they killed me earlier, though...

In Cold Blood - seems to be a revenge kill?

I think Cold Blood might be a revenge kill a significant amount of time after being killed. I agree with Claude that I believe Blood for Blood is a revenge medal.

Blood for blood - I think it's for trading kills. The net code flaws have medals now.

lol - I think it's just a renamed 'Payback' medal. (I got one right after respawning and killing the guy who killed me.) Would be funny if you were right, though. ;)

I got a medal for killing a super with my super (golden gunned a phoenix), but I don't remember what it was called. "One in a Million" maybe?