How do you get the infected emblem?

Anyone know?

Get both Challenges for Flood?

Either Flood mastery or Flood victory mastery.

How do you actually win Flood matches? Most of my matches end up in a tie. =/

> How do you actually win Flood matches? Most of my matches end up in a tie. =/

Get the most points combined (all 3 rounds) at the end of the match.