You have to either be an employee of Bungie or have completed all of the Vidmaster Challenges. And there is a myth that there is a "recon skull" apparently in Cortana. Or at least i think it is.
the recon helmet for halo 3 is unlocked by completing all of the vidmaster challenges in halo 3 and halo odst
16.
you have to be a bungie member.
the recon comes if you pre-order halo and the flaming helmate comes in the legendary edition.
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.
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.
Commander
you unlcok captain dare the woman with recon helmet
Balls
you only get the recon armour if you beat all the windmaster achivments, and find all the mythic skulls. (you have to prove to bungi that you did this.
Halo Reach: Limited Edition comes with an Elite Officer, and recon helmet for your spartan.It also comes with a bonus disc with mini-games.P.S - This does NOT come with flaming recon helmet. See "Legendary" Edition.
you have to work for bungie to get recon