No, you mainly need a HDD ( Hard Drive ) for saving film clips and installing the game, which is optional.
Easy ways to level up in Reach: 1) Do the Daily/Weekly challenges! 2) Anything "Firefight" 3) Action Sack 4) Living Dead
For me, what i did was i just spammed daily challenges and weekly and just did Firefight Arcade ALOT, but it payed off :D.
u need xbox live
The same way you would reach other ranks: play matchmaking, do daily challenges, and go for commendations
You complete challenges that unlock body kits, then do daily challenges for a long while
Each challenge has a time limit. You can check the remaining time of your challenges at www.bungie.net6:00am Eastern Standard Time
By far, the best way to get credits are the challenges. Weekly ones give more of a reward, but for quick credits, do the daily ones. They can be seen by hitting the "Start" button, and scrolling down to challenges.
You play honestly. Play lots and finish daily challenges. Try the wiki as well. Maybe get the Halo reach guide book.
try to complete all the daily challenges in hopes to not be voted off if u win a challenge u have a safety for not being voted off for that day
Simply you play the game, sir.Complete Daily Challenges and Commendation'sA little forewarning though, Do not by any means boost credits as it is bannable by Bungie.net
There is only one real cheat in halo reach that I know of and its called the challenge reset cheat. What you do is you do one of the daily challenges like shooting and looting where you can get kills in any game mode. Well you do this until you get one kill before you complete the challenge then you save and exit the game (you should then start up a campaign mission). Then you get one kill and when it says challenge completed you unplug your usb cord to your Internet and totally cut yourself out from the Internet. After you do this you then save and quit once you do this you will have to reconnect your power and when yo go into challenges it will show you never did the challenge but you will have the credits as if you did. you can keep doing this over and over until you reach the daily cap limit of 60,000 credits. Hope this helps. :) lol
Save up your rox from the daily challenges, rox plants that you plant, rox trees in the port, and other daily challenges you do. If you were really desperate, you could sell your stuff.