Halo: The Rubicon Protocol

Halo: The Rubicon Protocol is a Halo novel by Kelly Gay, following surviving members of the United Nations Space Command as they mount a resistance against the Banished following their ambush by them in late 2559. The novel was originally set to be released March 15, 2022, but later was delayed to June 28, 2022, then delayed again to August 9, 2022.

In celebration of San Diego Comic Con between July 21–24, 2022, a few limited copies of The Rubicon Protocol were released early through the Simon & Schuster booth at the convention. Additionally, on the 8th and 29 July respectively, two short previews of the book were officially released by 343 Industries, with a third released in a Canon Fodder on 2 August. The links to these previews can be found at the bottom of this page.

Appearances
{{Featurelist|secondcolumn=title-6|title-1=Characters|

Artificial Intelligence

 * Cortana
 * Elfie
 * Mouse
 * Ouco
 * 091 Adjutant Veridity
 * 117649 Despondent Pyre

Human

 * Erik Bender
 * Lucas Browning
 * Unidentified Banished human inspector
 * Isaiah Cameron
 * Robin Dimik
 * Douglas-042
 * Horatio Fry
 * Hudson Griffin
 * Etana Hensler
 * Tomas Horvath
 * M. Jaide
 * Gavin Jo
 * John-117
 * Kinney
 * Nina Kovan
 * Thomas Lasky
 * Vedrana Makovich
 * Henri Malik
 * TJ Murphy
 * Owens
 * Sarah Palmer
 * Panago
 * Park
 * Rosado
 * Sarkar
 * Theodore Sorel
 * Kate Stalling
 * Bonita Stone
 * Si Wheeler

Jiralhanae

 * Atriox
 * Escharum
 * Gorian
 * Hectarius
 * Itacus
 * Tremonius

Sangheili

 * Chak 'Lok
 * Jega 'Rdomnai

Unggoy

 * Glibnub

Xalanyn

 * The Harbinger


 * title-2=Species|
 * Flood
 * Forerunner
 * Gasgira
 * Human
 * Ancestors
 * Jiralhanae
 * Kateukal
 * Kig-Yar
 * Mgalekgolo
 * Sangheili
 * Unggoy
 * Xalanyn


 * title-3=Organizations|
 * Banished
 * Bloodstars
 * Hand of Atriox
 * Witch's Eye
 * Created
 * Covenant
 * United Nations Space Command
 * Office of Naval Intelligence
 * UNSC Armed Forces
 * Boat crew
 * Spartan Operations
 * SPARTAN-II program
 * Blue Team
 * SPARTAN-IV program
 * Fireteam Intrepid
 * Fireteam Shadow
 * Fireteam Taurus
 * Fireteam Windfall
 * UNSC Marine Corps
 * Orbital Drop Shock Troopers
 * Gravediggers
 * Hatetriox


 * title-4=Locations|
 * Anvil Station
 * Milky Way
 * Bhaakto system
 * Alluvion
 * Vaslo
 * Kuyik
 * Ephsu system
 * Installation 07
 * Cartographer
 * Conservatory
 * Outpost Tremonius
 * Redoubt of Sundering
 * Tower
 * House of Reckoning
 * Beam emitter
 * Oth Sonin system
 * Doisac
 * Teash
 * Warial
 * Sverdlovsk system
 * Talitsa


 * title-5=Events|
 * Bow to Stern relay
 * War
 * First Immolation
 * Human-Covenant War
 * Post-Covenant War conflicts
 * Created conflict
 * Razing of Oth Sonin
 * Battle for Zeta Halo
 * Battle over Installation 07
 * Assault on the Mortal Reverie
 * Battle of the Beacon Tower


 * title-6=Vehicles|

Human

 * F-41 Broadsword
 * FSS-1000 Sabre
 * GA-TL1 Longsword
 * Mongoose
 * M9 Wolverine
 * M9407 drop pod
 * Pelican
 * Scorpion
 * SKT-29 Bumblebee
 * Echo India Bravo Zero Eight
 * Papa Tango Delta Zero Nine
 * RLT-85 Emergency Shuttlepod‎
 * Warthog
 * RLT-85 Emergency Shuttlepod‎
 * Warthog
 * RLT-85 Emergency Shuttlepod‎
 * Warthog

Banished

 * Banished dreadnought
 * Banshee
 * Chopper
 * Dovotaa Workshop Griever
 * Ghost
 * Klavbrig Workshop Shroud
 * Klavrig Workshop Skitterer
 * Phantom
 * Banished Phantom
 * Qavardu Workshop war-skiff
 * Scarab
 * Seraph
 * Banished Seraph
 * Wraith
 * Terror Wraith


 * title-7=Weapons|

Human

 * BR75 battle rifle
 * Energy bayonet
 * M11 combat knife
 * M395 DMR
 * M41 SPNKR
 * M6 series
 * M85 Scythe
 * M870 Rampart point defense gun
 * M9 fragmentation grenade
 * M965 Fortress point defense network
 * Magnetic Accelerator Cannon
 * MA series
 * MA5 series
 * MA5D assault rifle
 * MA5K carbine
 * MLRS-2 Hydra
 * Mk50 Sidekick
 * MX-10 mini-brick
 * SRS99 series
 * SRS99-S5 AM sniper rifle
 * SRS99-S7 AM sniper rifle

Banished

 * Flaktura Workshop Skewer
 * Ghostpierce
 * Gorespike cannon
 * Jiralhanae combat knife
 * Jovokada Workshop spike grenade
 * Needler
 * Plasma pistol
 * Sicatt Workshop shock rifle
 * Thrasher missile
 * Type-1 energy sword
 * gravity hammer
 * Type-25 Brute Shot
 * Ukala Workshop Spike Revolver
 * Veporokk Workshop Ravager
 * Type-25 Brute Shot
 * Ukala Workshop Spike Revolver
 * Veporokk Workshop Ravager


 * title-8=Technology and equipment|

Forerunner

 * Ancilla
 * Monitor
 * Halo Array
 * Beacon tower
 * Conspectus network
 * Cylix
 * Light bridge
 * Sentinel
 * Aggressor Sentinel
 * Slipspace portal
 * Teleportation grid
 * Teleportation grid

Human

 * Active camouflage
 * Artificial intelligence
 * Personal AI
 * Biofoam
 * Energy shielding
 * Forward Operating Base
 * Heads-up display
 * MJOLNIR Powered Assault Armor
 * HIVEMIND-class Mjolnir
 * MJOLNIR Powered Assault Armor (GEN3)
 * ANUBIS-class Mjolnir
 * STORMFALL-class Mjolnir
 * TRAILBLAZER-class Mjolnir
 * Motion sensor

Banished

 * Jump pack
 * Kig-Yar point defense gauntlet
 * Propaganda tower


 * title-9=Miscellaneous|
 * Tossers

}}

Production notes
Despite having narrative connections to Halo Infinite, Halo: The Rubicon Protocol was reported prior to release to stand on its own and would not be "required reading" for fans to understand the game's story.