SECURITY-class Mjolnir

Security
GEN3 GEN2 GEN1 Mark VI GEN1 Mark V GEN3 GEN2 GEN1 Mark VI GEN1 Mark V
Production overview
Manufacturer(s):	Misriah Armory
Testing site(s):	Mars (development)
Type:	MJOLNIR (GEN1) Mark IV Mark V Mark VI MJOLNIR (GEN2) MJOLNIR (GEN3)
Role(s):	Ship and station defense

SECURITY-class Mjolnir, also designated as the MJOLNIR Powered Assault Armor/M variant, is a MJOLNIR armor variant adapted from an infiltration prevention suit designed by Misriah Armory.

GEN1 overview

Development history

The Security variant was first manufactured in the Misriah Armory facility on Mars in 2528. After Mark V was released, this armor was adapted to its use. Like most MJOLNIR variants, the later model of the Security helmet had been upgraded to be compatible with all MJOLNIR Mark VI variants. The Mark V iteration of the helmet is compatible with CBRN, UA, CNM and HUL attachments.

After the first wave of GEN2 systems, based on requests of veteran Spartan-II and Spartan-III operatives, the UNSC Ordnance Commission considered reassessing a refined and upgraded version of the EVA-class Mjolnir suit. This led to the creation of the WRATH-class Mjolnir where its right shoulder pad is based off the Mark V Security shoulders. SECURITY [GEN1] helmets continued to be used by Misriah Armory's executive protection teams after the Covenant War. These helmets have been upgraded to be compatible with GEN2 systems, though corporate representatives balk at releasing its custom VISR. As late as 2560, the GEN1 Security helmet and shoulders could still be requisitioned by Spartans, upgraded to be compatible with GEN3. These helmets are used by Spartans assigned to the Office of Naval Intelligence's Physical and Technical Security Office, used to defend information depots and military sites.

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  Mark V variant.

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  Mark VI variant.

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  GEN2 compatible Mark V variant.

GEN2 overview

Design details

The GEN2 variant's helmet possesses two watchdog AIs, which lay in wait for potential cyberintrusion attempts, and sensor anomalies that could indicate subversion of connected surveillance networks. The armor also seamlessly integrates with Navy networks and security constructs.

Development history

The GEN2-era Security set was built to Spartan branch requirements for ship and station defense personnel.

GEN3 overview

Design details

The GEN3 Security helmet is specialized in cyber-defense, with dedicated watchdog AI hosting hardware to locate compromised battlenet branches and burn out intruding constructs.

In-game information

Halo 3

The Security armor is available as an armor permutation in Halo 3. The set consists of a helmet and shoulders; in the Xbox 360 editions of Halo 3 the helmet additonally comes with a small antenna attachment for the right shoulder. This was retained in the launch-era version of Halo: The Master Chief Collection, though the addition of Halo 3 on PC and the start of Series 2 saw the antenna detached from the helmet and selectable as its own chest option separate from the Security helmet. Later on in Series 7: Elite, the antenna chest option was removed and reverted back to only displaying while the accompanying helmet was equipped. If any of the chest items from Halo Online or Halo: Fireteam Raven are equipped, the antenna simply does not display.

The helmet's most noticeable feature is the larger, more prominent "figure-eight" shaped visor which looks almost bug-eyed. It bears resemblance to that of a modern day fighter jet pilot helmet. This helmet is inspired by the protagonist of Marathon, although the mouth is covered. The helmet is large with a small raised section on the forehead in the form of the Marathon logo. Wearing the helmet will also add a small antenna and dial to the right shoulder.

Armor	Description	Unlock requirements (Halo 3)	Unlock requirements (Halo: MCC)
Security	Helmet: The Mjolnir(m) variant was manufactured at the Misrah Armories Facility on Mars in 2528. It has been upgraded and modified to be compatible with all current-issue armor variants.	Get a total of 1000 in Halo 3.	Unlocked by default.
	Shoulder: The Mjolnir Mark V(m) Powered Assault Armor was originally manufactured in 2528 and recently upgraded to be compatible with all current-issue armor variants.	Get a total of 750 in Halo 3. Note: These shoulders are known to be buggy, and may not unlock.
	Chest: N/A	N/A	Unlocked by default (Season 2), now unobtainable
	MCC: The first SECURITY variant was manufactured in 2528.		Unlocked by default

Halo: Reach

"The MJOLNIR(M) variant helmet was manufactured at the Misriah Armories facility on Mars in 2528."

All variants of the Security helmet in Halo: Reach from left to right; BASE, UA/HUL and CBRN/CNM.

The Security armor returns as an armor permutation in Halo: Reach, mostly unchanged from the Halo 3 incarnation - though with the removal of the antenna chest. The Security right shoulder is equipped with a Kukri knife, and is used by Emile in the campaign. Halo: Reach introduces some additional similarly-named armor, the UA/Base Security set - details on the Base Security addons can be found here.

Armor	Description	Unlock requirements (Halo: Reach)	Unlock requirements (Halo: MCC)
Security helmet	All (M) variant helmets have been upgraded to be compatible with all current issue armor.	General, 250,000 cR	Series 1, Tier 90 ( 1)
Security (UA/HUL)	Up-armored variant with hardened uplink module for MILINT acquisition.	General, 200,000 cR	Series 1, Tier 96 ( 1)
Security (CBRN/CNM)	For operations in hazard zones; command network module.	Legend, 200,000 cR	Series 1, Tier 99 ( 1)
Security shoulders	The Supplemental Armor, Pauldron, MJOLNIR(M) variant was originally manufactured in 2528.	General, 70,000 cR (left) 250,000 cR (right)	Series 1, Tier 83 ( 1) (both)

Halo 5: Guardians

After being absent in Halo 4, Security returned as an armor permutation in Halo 5: Guardians, being unlockable via the Requisition system. The armor has been redesigned for GEN2, though it retains some characteristics of the original Halo 3 and Reach iterations. A Reach-styled iteration was later introduced in the Monitor's Bounty update as the Security [GEN1] helmet, with its right shoulder pad appearing on the WRATH armor set released during Memories of Reach.

Armor	Description	Rarity	Introduced in	Unlock requirements
Security GEN1 (helmet)	SECURITY [GEN1] helmets continued to be used by Misriah Armory's executive protection teams after the Covenant War. These helmets have been upgraded to be compatible with GEN2 systems, though corporate representatives balk at releasing its custom VISR.	Rare	Monitor's Bounty	Purchase the Classic Helmet REQ Pack for 150,000 or $9.99
Security (helmet)	Two watchdog AIs hover at the edges of the SECURITY VISR interface, alert for cyberintrusion attempts and sensor anomalies that could indicate subversion of connected surveillance networks.		Introduced on launch.	Purchase a Silver REQ pack for 5,000 REQ points.
Security Oppressor (helmet skin)		Ultra Rare		Purchase a Gold REQ pack for 10,000 REQ points.
Security Watchdog (helmet skin)
Security (body)	Built to Spartan branch requirements for ship and station defense personnel, SECURITY armor seamlessly integrates with Navy networks and security constructs.	Rare		Purchase a Silver REQ pack for 5,000 REQ points.
Security Oppressor (body skin)		Ultra Rare		Purchase a Gold REQ pack for 10,000 REQ points.
Security Watchdog (body skin)

Halo Infinite

The Security Mark V shoulder pauldrons return in Halo Infinite, available under the SAP category for the Mark V (B) core. The Security GEN3 helmet, alongside an exclusive helmet attachment was introduced as part of the Aquahex superbundle at the start of Season 03: Echoes Within. Season 05: Reckoning added the Mark V Security helmet along with a new helmet attachment for it. All variants of the helmet and shoulder pads would be made cross-core with Season 05: Reckoning and Spirit of Fire, respectively.

Armor	Manufacturer	Lore	Rarity	Introduced In	Unlock Requirements
Security GEN3	Misriah Armory	The latest SECURITY helmets are focused on cyber-defense, with dedicated watchdog AI hosting hardware to locate compromised battlenet branches and burn out intruding constructs.	Legendary	Season 03: Echoes Within	Purchase either: "Aquahex" for 2,200 cR "Security GEN3" for 1,200 cR
Security		Defending information depots and military sites remains a critical task for Spartans detached for assignment with ONI's Physical and Technical Security Office.	Epic	Season 05: Reckoning	Season 05: Reckoning Battle Pass level 5 (Premium)
Oppressor Mark II		The Oppressor sub-variant of the GEN2 Security armor has become its own dedicated offensive netwar ensemble.	Legendary	Season 03: Echoes Within	Purchase either: "Aquahex" for 2,200 cR "Security GEN3" for 1,200 cR
UA/CPU-001		The future of military policing.	Epic	Season 05: Reckoning	Season 05: Reckoning Battle Pass level 10 (Premium)
SAP/SEC		This shoulder armor was a simple adaptation of gear already utilized by Misriah corporate security.	Epic	Winter Update	Left: Winter Update Battle Pass level 4 (Free) Right: Winter Update Battle Pass level 5 (Free)
SAP/SEC [K]		This shoulder armor was a simple adaptation of gear already utilized by Misriah corporate security.	Legendary	Winter Update	Left: Winter Update Battle Pass level 27 (Free) Right: Winter Update Battle Pass level 28 (Free)
Defiled Guard	The Flood	The unnatural growths quiver with incubating spores.	Legendary	Season 05: Reckoning	Purchase either: "Blighter" for 2,000 cR "The Flood" for 2,800 cR

GEN1 attachments

• UA/Type B1

GEN3 attachments

• Calling Card
• CNM(5)/BNR/FASCINATOR
• Flower Power
• HUL-I/LIGHTLINK
• HUL-I/RS/FACELIFT
• HUL-I/RS(X)/HEMLOCK
• HUL(4X)/ENIT/WITCHBRANCH
• Needle Minder
• Purrfect Audio

Production notes

Language	Equivalent
French	Sécurité in Halo 3 and Halo: Reach. Security in Halo 5: Guardians.

During the development of Halo 5: Guardians, the GEN2 Security armor was internally designated as "A067" when it was conceived.

Errors

The 2009 edition of the Halo Encyclopedia erroneously states the Security armor was manufactured in 2543 rather than 2528.

References

The SECURITY-class helmet, as well as the Mark VI version's pauldrons are based on the armor worn by the protagonist of the Marathon series, who is a security officer on the eponymous vessel. The Marathon logo is featured prominently on the Mark VI version of the helmet just above the visor in Halo 3. The Security helmet in Halo: Reach and Halo 5: Guardians both lack the symbol, likely due to intellectual property concerns as Bungie retained the Marathon IP after leaving Microsoft. However, the Reclaimer symbol, which in and of itself is a modified version of the Marathon logo, appears on the GEN2 version of the helmet in Halo 5: Guardians in its place.

Gallery

Browse more images in this article's gallery page.

Concept art and illustrations

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  Halo 3 concept art for the Security armor.

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  Spartan-II training personnel clad in Security armor in Halo: Blood Line.

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  Halo 5: Guardians concept art of GEN2 Security armor.

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  Halo Infinite concept art of the GEN3 Security helmet.

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  Halo Infinite concept art of the Oppressor Mark II attachment for the Security helmet.

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  Michael-120 depicted in a Security helmet from the Halo Encyclopedia.

Developmental images

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  The character sprite of the Marathon's security officer in his battle armor, which became the basis for the Security armor.

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  Security officer's HD sprite from the Xbox LIVE Arcade port of Marathon 2: Durandal.

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  Renders of the GEN2 Security armor for Halo 5: Guardians.

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  Prop of Owen-B096's Security shoulder for Halo: Outpost Discovery.

Screenshots

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  A Spartan-II clad in full Mark VI Security armor in Halo 3.

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  A Spartan-II clad in full Security armor in Halo 3.

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  A Spartan-II clad in full Security armor in Halo 3.

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  The antenna attachment on the right shoulder in Halo 3.

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  A Spartan-III with the UA/HUL attachments on Mark V Security in Halo: Reach.

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  Security right shoulder with kukri in Halo: Reach.

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  A Spartan-IV using GEN2 Security in Halo 5: Guardians.

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  A Spartan-IV using GEN1 Security in Halo 5: Guardians.

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  GEN1 Security with the GEN2 Security skins in Halo 5: Guardians.

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  A SAP/SEC[K] shoulder in Halo Infinite.

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  A Recon-clad Spartan-IV sporting 2 SAP/SEC[K] shoulders on Bazaar.

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  A Spartan-IV (left) wearing a GEN3 Security helmet in Halo Infinite.

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  A Spartan-IV wearing a GEN3 Security helmet at the Avery J. Johnson Academy of Military Science.

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  A GEN3 Security-clad Spartan-IV with the HUL-I/LIGHTLINK attachment on Oasis.

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  A GEN3 Security-clad Spartan-IV with the Oppressor Mark II attachment on Launch Site.

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  Alternate angle of the Oppressor Mark II attachment.

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  A Spartan in the GEN1 Mark V Security helmet and SAP/SEC shoulders in Halo Infinite.

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  A Spartan sprinting in GEN1 Security armor on Arid.

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  GEN1 Mark V Security with the UA/CPU-001 attachment on Prism.

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  GEN3 Security in comparison to GEN1 Mark V Security.

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  Alternate view of the GEN3 and GEN1 Security helmets.

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  A Blighter-clad Spartan sporting a left SAP/SEC(K) shoulder and right Defiled Guard shoulder.

Halo 5: Guardians skins

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  Default skin.

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  Oppressor skin.

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  Watchdog skin.

List of appearances

• Halo 3 (First appearance)
• Halo: Blood Line
• Halo: Reach
• Halo 5: Guardians
• Halo Mythos
• Halo: Outpost Discovery
• Halo Infinite