no you can't so you need to wait till the seventh and get seven exp in the seven on seven catergory on the sevnth of the month
to get it, you have to have 7 exp in a playlist on the seventh of the month. on the seventh, try going into something you dont play much and earn 7 exp.
you have to get the 7th exp on the 7th day of the month. so you can get the 6 exp anytime but you have to be playing on the 7th of the month and get 1 more exp to get the achievement
I don't think so, becaue none of them are are ranked free for all games.
you need to have 100 exp and 10 skill level to become a lieutennant (officer) on halo 3
you need to get 1000+ achievement points from halo 3
in the achievement were in for some chop on halo 3 you do not get scout shoulders, sorry
You win games to earn EXP.
Go to Halocharts.com to see
keep doin matchmaking.
if you lose too much on a ranked playlist in matchmaking you can lose exp
Enter a ranked playlist on the seventh day of any month and keep playing until your EXP for that playlist reaches or exceeds 7 (doesn't work if you already have 7 or more EXP on the playlist your using)
100 exp. and a skill of at least 10