SPARTAN Armor Helmets * Mark VI: Unlocked by default. * CQB: Unlocked by default. * EVA: Unlock the Campaign Complete: Normal Achievement. * EOD: Unlock the Campaign Complete: Legendary Achievement. * Hayabusa: Collect all 13 Skulls in Campaign mode. * Security: Either get 49 Achievements in Halo 3, or accumulate up to 1000 Gamerscore in Halo 3. * ODST: Unlock the Spartan Graduate Achievement. After TU2, in the new rank progression system this Achievement must be unlocked by reaching the rank of Private grade two in any playlist ranking. * Mark V: Unlock the UNSC Spartan Achievement. After TU2, in the new rank progression system this Achievement must be unlocked by reaching the rank of Sergeant in any playlist ranking. * Rogue: Unlock the Spartan Officer Achievement. After TU2, in the new rank progression system this Achievement must be unlocked by reaching the rank of Lieutenant in any playlist ranking. * Recon: One way is to unlock all of the Vidmaster Achievements in Halo 3 and Halo 3: ODST. The problem is that for the achievement, "Brainpan," you must find the skulls on all 6 Mythic Maps, and the three maps coming with Halo 3: ODST, meaning that you must wait until the release of Halo 3: ODST to get the achievement. The armor can also be unlocked by doing something that makes Bungie feel you deserve it, such as a Forge map, screenshot, or machinima (but this is a rarity). * Scout: Unlock the Used Car Salesman Achievement. Shoulder Pieces * Mark VI: Unlocked by default. * CQB: Unlocked by default. * EVA: Complete The Ark in Campaign on Normal or higher difficulty. * EOD: Complete the level The Ark on Legendary difficulty. * Hayabusa: Collect at least 9 skulls. * Security: Earn 900 Gamerscore on Halo 3. Due to inconsistency, this armor permutation is not always given at 750. There are some reports that the Security Shoulders need a minimum of 350- 995 Gamerscore, even though the official guide to Halo 3 lists the requirements as 750. Even then, the armor permutation may be unlocked, and then re-lock itself after a time, as has been reported. The only way to keep it permanently is to get all the achievements. This permutation may sometimes need the player's model to have accessed online to unlock it. * Scout: Unlock the Mongoose Mowdown achievement. * Recon: Get all the Vidmaster Achievements in Halo 3 and Halo 3: ODST. It can also be unlocked by doing something that makes Bungie feel you deserve it, such as a Forge map, film or screenshot. All the Armor Permutations. Chest Armor * Mark VI: Unlocked by default. * CQB: Unlocked by default. * EVA: Complete The Tsavo Highway on Normal difficulty or higher. * EOD: Complete The Tsavo Highway on Legendary difficulty. * Hayabusa: Collect at least 5 skulls in campaign. * Katana (Add-On): Unlock at least 49 achievements which are worth 1000 or more Gamerscore points in Halo 3. NOTE: There are reports from people who get it with less achievements. Since the release of the mythic map pack the Katana seems to unlock for those that download early(without the need for 1000 gamerscore OR 49 achievements) * Scout: Unlock the Too Close to the Sun Achievement, although has been reported that it may appear later sometimes. * Recon: Get all the Vidmaster Achievements in Halo 3 and Halo 3: ODST. It can also be unlocked by doing something that makes Bungie feel you deserve it, such as a forge map or screenshot and also winning a contest or various competitions that Bungie composes. * Bungie: A popular misconception is that the Bungie Flaming Helmet is actually a helmet mostly perceived as Hayabusa, but in fact, it is a piece of fire on the collar. Thus, it is a chest piece. It is the Bungie Chest Piece that allows the flame on the head which can be used with any helmet and shoulder piece (The chest piece is identical to the EOD body piece). The only way to get it currently is to get hired at Bungie.