Spartan Ops

Spartan Ops is an episodic cooperative campaign in Halo 4. It is included as part of the Infinity game mode in lieu of Firefight.

Overview
Spartan Ops allows up to four players to play cooperatively. Though it is designed primarily as a cooperative experience, Spartan Ops can be played solo as well. It follows the SPARTAN-IV units Fireteam Majestic and Fireteam Crimson on their missions across Requiem, the Forerunner shield world introduced in the campaign. Set six months after the campaign, Spartan Ops expands on the story of the and her crew. Due to its scope and scale, this new mode has been likened to a second campaign for the game.

343 Industries will support additional Spartan Ops missions for months after launch of the game and players will have the opportunity to play from the beginning of the episodic campaign regardless of when they started playing. The first season is included with the game, though 343 Industries have not ruled out charging players for additional Spartan Ops seasons. Frank O'Connor has stated that the mode will "bridge the gap" between the events of Halo 4 and the future release of its sequel, Halo 5.

Halo: Infinity
Each episode is accompanied by an episode of Halo: Infinity, a computer-animated series that follows the crew of the UNSC Infinity. Produced by the British studio Axis Animation, the series' point-of-view alternates primarily between the ship's command crew and Spartan Fireteam Majestic. The events of the series intertwine directly with those of the cooperative missions, which in turn carry the story forward to the next episode. Those without an Xbox LIVE account may view the Halo: Infinity series on Halo Waypoint and on YouTube channel.

List of seasons
Each week, players with an Xbox LIVE Gold membership can view a new episode of Halo: Infinity, which is followed by five objective-based missions. The missions offer new content, as well as challenges to complete for each week.

Characters

 * Austen
 * Casillas
 * Catherine Halsey
 * Dunlap
 * Estey-Bethel
 * Gabriel Thorne
 * Gek
 * Grant
 * Henry Glassman
 * Hoya
 * Jared Miller
 * John-117
 * Jul 'Mdama
 * The Librarian
 * Lincoln
 * Madsen
 * Margaret Parangosky
 * Parg Vol
 * Paul DeMarco
 * Robert Dalton
 * Roland
 * Sarah Palmer
 * Serin Osman
 * TJ Murphy
 * Tashi
 * Thomas Lasky
 * The Ur-Didact

Equipment and technology

 * Artificial intelligence
 * Promethean Crawler
 * Crawler Snipe
 * Alpha Crawler
 * Promethean Knight
 * Knight Lancer
 * Knight Commander
 * Knight Battlewagon
 * Promethean Watcher
 * Cryo chamber
 * Data pad
 * Deployable lookout tower
 * Didact's Gift
 * Hard light
 * HAVOK tactical nuclear weapon
 * Janus Key
 * Kig-Yar combat harness
 * Storm variant
 * Heavy variant
 * Ranger variant
 * Sniper variant
 * Kig-Yar point defense gauntlet
 * Kig-Yar targeting headgear
 * M2705 Regenerative Kinetic Dispersal Field
 * M805X Forward Acceleration System/Fulcrum Mitigating
 * MJOLNIR Powered Assault Armor
 * MJOLNIR [GEN2]
 * Requiem translocation artifacts
 * Sangheili combat harness
 * Commander variant
 * Storm variant
 * Ranger variant
 * Warrior variant
 * Zealot variant
 * Series 12 Single Operator Lift Apparatus
 * Stationary shield generator
 * Type-3 Refraction Dissonance Modifier/Camouflage
 * Unggoy combat harness
 * Heavy variant
 * Imperial variant
 * Storm variant
 * Ranger variant
 * Z-90 Photonic Coalescence Emitter/Aegis
 * Z-2500 Automated Protection Drone
 * Z-5080 Short-Range Spectrum Augmenter/Vision

Events

 * Human-Promethean War
 * Battle of Earth (2557)
 * Requiem campaign

Locations

 * Sol system
 * Earth
 * United Republic of North America
 * New Phoenix
 * Luna
 * Requiem
 * Apex
 * Control
 * Copernicus Base
 * Fortress
 * Galileo Base
 * Harvester
 * Lockup
 * Quarry
 * Sniper Alley
 * The Cauldron
 * The Gate
 * The Refuge
 * Two Giants
 * Warrens

Organizations

 * Ecumene
 * Lifeworker
 * Promethean
 * Covenant remnant
 * Prehistoric human civilization
 * United Earth Government
 * United Nations Space Command
 * Spartan
 * SPARTAN-IV Program
 * Fireteam Crimson
 * Fireteam Majestic
 * UNSC Army
 * UNSC Air Force
 * UNSC Marine Corps
 * UNSC Navy
 * Fleet Command
 * Naval Special Weapons
 * SPARTAN-II Program
 * Office of Naval Intelligence

Species

 * Forerunner
 * Human
 * Kig-Yar
 * Lekgolo
 * Mgalekgolo
 * Sangheili
 * Unggoy

Vehicles

 * CCS-class battlecruiser
 * CRS-class light cruiser
 * D79-TC Pelican
 * Deployment Platform Type-56 Ground Support/Ultra Heavy
 * F-41 Broadsword
 * Infinity-class ship
 * Harvester
 * HRUNTING/YGGDRASIL Mark IX ADS
 * M12 Force Application Vehicle
 * M12 Light Reconnaissance Vehicle
 * M12G1 Light Anti-Armor Vehicle
 * M12R Light Anti-Aircraft Vehicle
 * M274 Ultra-Light All-Terrain Vehicle
 * M808 Main Battle Tank
 * Type-26 Assault Gun Carriage
 * Type-26 Ground Support Aircraft
 * Type-31 Exoatmospheric Multi-role Fighter
 * Type-32 Rapid Assault Vehicle
 * Type-44 Troop Carrier
 * Type-55 Anti-Infantry Stationary Gun
 * UNSC prowler
 * Unidentified UNSC capital ship (antennae)
 * UNSC prowler
 * Unidentified UNSC capital ship (antennae)
 * Unidentified UNSC capital ship (antennae)

Weapons

 * ARC-920
 * Assault cannon
 * Beam turret
 * BR85 Heavy Barrel Service Rifle
 * Combat knife
 * M247H Heavy Machine Gun
 * M363 Remote Projectile Detonator
 * M395 Designated Marksman Rifle
 * M41 Surface-to-Surface Rocket Medium Anti-Vehicle/Assault Weapon
 * M45D Tactical Shotgun
 * M46 Light Anti-Aircraft Gun
 * M6 Grindell/Galilean Nonlinear Rifle
 * M6H Personal Defense Weapon System
 * M739 Light Machine Gun
 * M9 High-Explosive Dual-Purpose grenade
 * MA5D Individual Combat Weapon System
 * Sniper Rifle System 99-Series 5 Anti-Matériel
 * Unidentified UNSC missile battery
 * Type-1 Antipersonnel grenade
 * Type-1 Energy Weapon/Sword
 * Type-2 Energy Weapon/Hammer
 * Type-25 Directed Energy Pistol
 * Type-25 Directed Energy Rifle
 * Type-27 Special Application Sniper Rifle
 * Type-33 Guided Munitions Launcher
 * Type-33 Light Anti-Armor Weapon
 * Type-50 Directed Energy Rifle/Heavy
 * Type-51 Carbine
 * Type-52 Directed Energy Support Weapon
 * Type-55 Directed Energy Rifle/Advanced
 * Z-040 Attenuation Field Generator/Localized
 * Z-110 Directed Energy Pistol/Exotic
 * Z-130 Directed Energy Automatic Weapon
 * Z-180 Close Combat Rifle/Asymmetric Engagement Mitigator
 * Z-250 Directed Energy Engagement Weapon
 * Z-390 High-Explosive Munitions Rifle
 * Z-750 Special Application Sniper Rifle

Production notes

 * Prior to the adoption of the photorealistic CGI used in the final game, Spartan Ops episodes were to be accompanied by stylized motion comics akin to those featured in the Terminals. A sample was produced by Planet Jump, an animation studio based in London.
 * Each episode contains a radio that, when shot, plays the first few notes of the Red vs. Blue theme song. Doing so replaces some of the dialog in the episode with lines from the show's voice actors.
 * In Halo: Infinity, some weapons use models from older builds of the game, as seen in early in-game screenshots. For example, the BR85HB SR is erroneously labeled as the BR55HB SR and the M395 Designated Marksman Rifle lacks a front sight. The use of earlier builds to reference in-game assets might also explain why Commander Palmer's hair color varies between the campaign (reddish brown) and the Epilogue and Spartan Ops (nearly black).