Posted by: Remorazz
Firefight matchmaking - 800 medals in 3 hours = 10,000 cR
Firefight matchmaking - 800 kills in 3 hours = 10,000 cR
About 7 games of gruntpocalypse and you're done.
Same customs, but play FF doubles. I averaged 250 - 400 kills/game, and at least 400 medals/game. You'll cut your time in half.