Well you need to achieve the skill level 50 in a ranked playlist, which some people may never be able to do. You also need to get 600 exp though, which will take everyone different amounts of time to get to.
16 months
3-4 years
It's call a 5 star General and it is the top rank in Halo 3
Before.
5 star general
Downloading halo master can take anywhere from 2 minutes to 3 hours. It all depends on how good your internet service is.
Considering how the original Diablo came out in 1996 and Diablo 2 came out in 2000, it probably took 3-4 years to make.
uh...General Grade 4 maybe?
it went from inside halo to inside gaming. because inside halo was running out of news for halo 3 so it went onto gaming in general.
Brigadier General
It's a little bit longer than halo 3
3 thousand years.