Canon

CIO-class Mjolnir

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CIO
H5G-CIO.png
Production overview

Manufacturer(s):

Acheron Security[1]

Testing site(s):

Acheron Trauma Sim[1]

Type:

MJOLNIR (GEN2)

Role(s):

Counter intelligence

Technical specifications

Feature(s):

  • Tricloptically fixed multi-spectral imaging array
  • Galvanized sensory suite
  • Modular sensory suite
  • Silhouette dampener
 
“ Designed for counter-intelligence operability in the Martian territory of Acheron Fossae. ”

CIO-class Mjolnir (Counter Intelligence Operator) is a variant of the MJOLNIR Powered Assault Armor [GEN2] manufactured by Acheron Security.[2]

Overview[edit]

Design details[edit]

The CIO helmet has a tricloptically fixed multi-spectral imaging array, also known as a transponder array.[1][3] The neural interface bypasses in the CIO helmet allow the wearer to create custom synesthesis profiles to remap the suit sensors with their own senses.[4] The suit also has a galvanized sensory suite that rivals nearly all other similar service packages.[3]

The chest has a modular sensory suite, and a silhouette dampener for motion sensor circumvention.[1]

Development history[edit]

After seeing the need for highly trained, heavily armored personnel to be deployed deep into enemy-controlled territory, Acheron Security developed and manufactured the CIO-class armor, with its main focus on espionage rather than lethality. The armor was tested at the Acheron Trauma Sim,[1] and was designed to operate in the Martian territory of Acheron Fossae.[2]

Usage[edit]

Though rarely seen, it is utilized by a handful of SPARTAN-IVs and Counter-Intelligence Operators for intel acquisition and strategic data conveyance deep within enemy territory, often those who endure tier-nine theaters.[1]

Several CIO-armored Spartans were deployed to Terceira, where they captured and transmitted information crucial to the recovery of the colony from Insurrectionist forces.[1]

CIO is also used during information denial missions, hunting down enemy scouts and preventing them from acquiring data of tactical or strategic importance.[4]

In-game information[edit]

Halo 4 - GEN2[edit]

CIO was first introduced into the Halo games as an armor set in Halo 4. The armor has three available skins; Web (WEB), Ruin (RUIN) and Rush (RUSH).

Armor Description Unlock requirements
(Halo 4) 		Unlock requirements
(Halo: MCC)
CIO armor in Halo 4 with no skin.
CIO 		Description (H4): Designed for counter-intelligence operability in the Martian territory of Acheron Fossae. Complete the Spartan Slayer - Master commendation Unlocked by default.
Helmet description (MCC): Counter-intelligence system manufactured by Acheron Security.
Shoulders description (MCC): Modular left/right spaulder from CIO-class armor.
Chest description (MCC): The suit's galvanized sensory suite rivals similar service packages.
Bring me pictures of Spider-Man.
CIO WEB (WEB) skin 		Description (H4): Customized with WEB armor skin. Pre-order Halo 4 through Amazon
Included in the Halo 4 Game of the Year Edition 		Unlocked by default, as of Series 4: Reclaimer.
Helmet description (MCC) CIO helmet customized with WEB coating.
Shoulder description (MCC) CIO left/ right spaulder customized with WEB coating.
Chest description (MCC) CIO chassis customized with WEB coating.
CIO armor in Halo 4 with Ruin skin.
CIO Ruin (RUIN) skin 		Description (H4): Customized with RUIN armor skin. Purchase the CIO-armored Spartan action figure in the second series of McFarlane's Halo 4 action figures. This is not usable in Spartan Ops. Unlocked by default, as of Series 4: Reclaimer.
Helmet description (MCC) CIO helmet customized with RUIN coating.
Shoulder description (MCC) CIO left/ right spaulder customized with RUIN coating.
Chest description (MCC) CIO chassis customized with RUIN coating.
CIO armor in Halo 4 with RUSH skin.
CIO RUSH (RUSH) skin 		Description (H4): Customized with RUSH armor skin. Purchase the Champions Bundle. This is not usable in Spartan Ops. Unlocked by default, as of Series 4: Reclaimer.
Helmet description (MCC) CIO helmet customized with RUSH coating.
Shoulder description (MCC) CIO left/ right spaulder customized with RUSH coating.
Chest description (MCC) CIO chassis customized with RUSH coating.

Halo 5: Guardians - GEN2[edit]

The CIO set returns in Halo 5: Guardians. The helmet and body armor are unlockable as armor permutations through the Requisition system. The body armor includes the Aviator chest and shoulders, Ricochet forearms, and Recruit legs. The CIO set has no alternate skins.

Helmet Description Unlock requirements
H5G REQ Helmets CIO Rare
CIO (helmet) 		The neural interface bypasses in the CIO helmet allows the wearer to create custom synthesis profiles to remap the suit sensors with their own senses. Rare REQ card
REQ Card - Armor CIO.png
CIO (body) 		CIO's niche is information denial missions: hunting down enemy scouts and preventing them from acquiring data of tactical or strategic importance. Rare REQ card

Production notes[edit]

Promotional images for the "Ruin" skin also included the pattern on the Inner-plated wrist armor and Over-locking leg armor. The final release version of the "Ruin" skin only added the skin on the CIO's helmet, chest, and shoulder armor, leaving out the wrists and legs.

Gallery[edit]

Main-Superintendent.png Browse more images in this article's gallery page.

Halo 4[edit]

  • A render of the CIO armor without textures.

    A render of the CIO armor without textures.

  • Helmet, chest, and shoulder pieces only.

    Helmet, chest, and shoulder pieces only.

  • The CIO armor in Halo 4.

    The CIO armor in Halo 4.

  • The 3D model of CIO "Web" skin for Halo 4.

    The 3D model of CIO "Web" skin for Halo 4.

  • The Halo 4 Interactive Guide description.

    The Halo 4 Interactive Guide description.

  • Concept art for the Ruin skin.

    Concept art for the Ruin skin.

  • Web skin concept for Halo 4.

    Web skin concept for Halo 4.

  • Concept art for the Web skin.

    Concept art for the Web skin.

Halo 5: Guardians[edit]

  • Default skin

    Default skin

List of appearances[edit]

Sources[edit]

  1. ^ a b c d e f g Halo 4: The Essential Visual Guide, page 148
  2. ^ a b Halo 4, Armory description
  3. ^ a b Halo 4 Limited Edition, Infinity briefing packet
  4. ^ a b Halo 5: Guardians, Armory description

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List of armor permutations by game title

v • d • e
 
List of armor permutations in Halo 4
Armor

Regular: Air Assault • Aviator • CIO • Commando • Deadeye • Defender • EOD • Enforcer • EVA • FOTUS • GUNGNIR • HAZOP • Infiltrator • Locus • Mark VI • Oceanic • Orbital • Protector • Raider • Ranger • Recon • Recruit • Scanner • Scout • Soldier • Strider • Vanguard • Venator • Warrior • War Master

Specialization: Engineer • Operator • Pathfinder • Pioneer • Rogue • Stalker • Tracker • Wetwork
Forearms/Legs
MCC-exclusive
Cut armor
v • d • e
 
List of armor permutations in Halo 5: Guardians
Achilles • Air Assault • Anubis • Argonaut • Argus • Athlon • Atlas • Aviator • Breaker • Buccaneer • CQB • Centurion • Challenger • Cinder • CIO • Commando • Copperhead • Cyclops • Cypher • Deadeye • Decimator • Defender • Dynast • EOD • Enforcer • Engineer • EVA (GEN1 and GEN2) • Fenrir • Foehammer • FOTUS • Freebooter • Goblin • GUNGNIR • Helioskrill • Hellcat • Helljumper • Hermes • Hunter • Icarus • Indomitable • Infiltrator • Interceptor • Intruder • Jumpmaster • Legionnaire • Locus • Mako • Marauder • Mark IV • Mark V (Alpha and Delta) • Mark VI (GEN1 and GEN2) • Maverick • Military Police • Nightfall • NOBLE • Nomad • Olive • Operator (GEN1 and GEN2) • Orbital • Pathfinder • Pioneer • Pilot • Protector • Raider • Raijin • Ranger • Reaper • Recluse • Recon (GEN1 and GEN2) • Recruit • Rogue • Scanner • Scout • Security (GEN1 and GEN2) • Seeker • Shinobi • Soldier • Stalker • Stinger • Strider • Teishin • Technician • Timmy • Tracer • Tracker • Valkyrie • Vector • Venator • Venture • Vigilant • Viper • Void Dancer • Warrior • War Master • Wetwork • Wrath
For a complete list, check out our armor category.

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List of armor permutations by generation

v • d • e
 
MJOLNIR Powered Assault Armor
Mainline armor generations
Mark I • Mark II • Mark III • GEN1 (Mark IV • Mark V • Black • Mark VI • Mark VII) • GEN2 • GEN3
Armor components
Competing and related projects
ARTAIUS • Buccaneer • COBALT • HAYABUSA • HRUNTING • MELAENO • Mirage • OSTEO • Rakshasa • Shinobi • SPI • YGGDRASIL
Armor permutations (by generation)
Supplemental equipment
v • d • e
 
GEN2
Mark variants
Mark IV (GEN2) • Mark V (GEN2 • Alpha • Delta) • Mark VI (GEN1 • GEN2 • MOD) • Mark VII (GEN2)
Variants originating from GEN1
Air Assault • Argus • Commando • Centurion • EOD • EVA • GUNGNIR • HAZOP • ODST • Operator • Orbital • Raider • Ranger • Recon • Rogue • Scout • Security • Strider • Venator
Variants based on GEN1
New variants
Achilles • Anubis • Argonaut • Athlon • Atlas • Aviator • Barvo • Breaker • Challenger • Cinder • CIO • Copperhead • Cyclops • Cypher • Deadeye • Decimator • Defender • Dynast • Enforcer • Engineer • Fenrir • Foehammer • FOTUS • Freebooter • Goblin • Helioskrill • Hellcat • Helljumper • Hermes • Hunter • Icarus • Infiltrator • Interceptor • Jumpmaster • KEYSTONE • Legionnaire • Locus • Mako • Marauder • Maverick • Mirmillion • Nightfall • Nomad • Oceanic • Oppressor • Pathfinder • Pioneer • Prefect • Protector • Raijin • Reaper • Recluse • Recruit • Ricochet • Scanner • Seeker • Soldier • Stalker • Stinger • Teishin • Technician • Tracer • Tracker • Valkyrie • Vanguard • Vector • Venture • Viper • Void Dancer • Warrior • War Master • Wetwork
Forearms/Legs
Other
For a complete list, check out our MJOLNIR armor category.
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