Originally Posted by ValkyrieScorpio
I boosted with some friends last night and that is how I got the trophy. I got 5 friends and had all of them become different colors. When I killed one I made sure to remember that color. It only took a couple min but I got it.
Its hard though because the servers are rubbish. I tried meeting up with a Japanese friend, but we could not invite him to team matches through a custom match or public lobby but we could NOOSE with him. I'll get it eventually if I keep at it.