the level it is unlocked is Lt.colonel.
Commander Helmet. Unlocked after you reach the Commander rank. Rank is currently capped at LT.Cornel Grade 3, Commander is the next rank.
The Commando helmet in Halo: Reach is unlocked at the rank of Commander (600,000 total cR and +60,000 from the previous rank which is Lt. Colonel Grade 3). It costs 85,000 cR
There is no hayabusa helmet in halo reach
Most armor is unlockable by rank, then made buyable with credits. Some of the halo reach armor is unlocked via halo waypoint (downloadable in xbox dashboard). Other armor such as the flaming helmet are unlocked from a code that comes with certain sets of the game. ( legendary edition, pre-order, etc.
the recon helmet for halo 3 is unlocked by completing all of the vidmaster challenges in halo 3 and halo odst
You have to be the last rank and 100% Armor completion
the commando helmet
There's no code for the helmet.
Do a bulltrue in matchmaking to unlock the avatar award.
Any preorder of Halo: Reach will get you the Recon Helmet for free use in Halo: Reach ONLY. If you preorder the Legendary Edition you will receive the Bungie flaming helmet.
Work for bungie, or buy the legendary edition of halo: reach.
First, rank up until you get to Major, then buy the EVA helmet(It is required or the EVA (C) won't be unlocked). Then, rank up until you get to Commander and EVA (C) or Emile's helmet will be available for 120,000 credits.