Commander. It's impossible right now because of the cap though.
well for helmets their is the commando helmet,EVA(C) ,pilot helmet,and if u need any moar info search halopedia and when u click on the link,search on that site armour permutations !
Simple: you must be rank commander or higher. Emiles helmet is a helmet of its own.
300,000 credits
No dude you have to have halo waypoint and you need to get to a certain milestone which means a certain amount of achievements and you need to beat the campaign on heroic or legendary and boom you have the CQB helmet or the police helmet one of the two
The only way to have got it is by pre ordering Halo Reach. In other words... it's to late. You can also get it by having a bungie.net account. You need to get some achievements about *vidmaster* from Halo 3 and Halo 3 ODST and follow what they tell you for a recon helmet, i don't know if it comes with flames.
beat the campaign on heroic(might as well beat it on legendary),and go on halo waypoint(u need xbox live)
You have to be the last rank and 100% Armor completion
For the avatar award you need to get a killtrocity (5 kills within 4 seconds of each other) in multiplayer matchmaking You need to be a Captain i think to get the grenadier helmet in the armory
Yes. You need to achieve the rank of Colonel.
To get the haunted helmet you need to BE ABLE to buy every helmet and attachment in the armory (excludes Waypoint helmets), so you need to be around General Rank. Then buy the PILOT HELMET and ATTACHMENTS, after this another attachment will appear. This is the Haunted Helmet, all you have to do is buy it for 1cR!!!
To acquire your "Recon" helmet and "Legendary" armor effect in Halo: Reach, you need to open the Xbox Guide menu, and scroll left to "Marketplace". Afterwards, you must select "Redeem Code", and input the code exactly as it appears on the code sheet.
you need halo 3 ODST to access the halo reach multiplayer beta