There are several ways to earn credits, some people suggest credit farming (Repeating one action that will always earn around 200-500 creds a min) but i find this boring and unsatisfying, so I recommend playing the campaign (the harder the difficulty the better)
But make sure you have scoring on free for all!
Yes
Earn higher ranks online and more credits
Earn higher ranks online and more credits
Just drive around forge for a while.
You always get credits in halo reach until you reach inheritor, you only get banned if you get said credits illegally...
You get credits by finishing games, winning games, and getting commenadtions.
Firefight Arcade is THE fastest way to earn credits, use it now before they take it off the setlists :)
Probably by playing firefight mode. Every time you kill a covenant you get credits.
yes because it is customizable, it was revealed in the extended gameplay in the space mission
no
Without matchmaking or the Oni Sword Base farming, there's no fast way to do it. Challenges are the only way I can think of and most of those require matchmaking.
you dont