You pretty much have to do the objective of a medal in a single match. I still havn't figured out Artifact 19... that's the only medal from that game I don't got.

thats what happened to me on a the street fighter collab i got most of the medals but they said i didnt get them then i got the bloodshot one but when i went back to my profile it said i didnt get. i just go back and reearn the medals. (p.s. you get the artifact 19 by getting every other medal.)

Well great minds think alike. Man, you need to keep killing with the same weapon or method, non stop to unlock the medal. Oh and...cool. Hey me and you should team up. I look at my profile to see all the medals I unlocked. Oh under your Clone Troop pic, I on the other hand like ROMEN NODDLES!!!! Fish is my favorite food, but I like shrimp and fried fish sticks. Well good luck. I have a ton of medals. If I you respond, and I don't respond in time I am sorry.-DLM.