- 06/12/2015 | Character | Promethean Soldier
- 06/21/2015 | Weapon | Splinter Turret
- 07/04/2015 | Vehicle | Unidentified Covenant excavator, now identified as the Kraken
- 07/11/2015 | Lore | List of war games map designations was merged with War Games
- 08/21/2015 | Character | Knight Marshal
- 08/21/2015 | Character | Knight Strategos
- 08/22/2015 | Medal | Boss Takedown
- 08/21/2015 | Medal | Legendary Takedown
- 08/22/2015 | Character | Sangheili Ranger Commander
- 08/22/2015 | Character | Soldier Captain was originally a redirect
- 08/23/2015 | Character | Soldier Enforcer
- 09/18/2015 | Gameplay | List of REQ cards
- 09/18/2015 | Gameplay | List of REQ cards/Loadout Weapons
- 09/18/2015 | Gameplay | List of REQ cards/Power Weapons
- 09/18/2015 | Gameplay | List of REQ cards/Armor Mods
- 09/18/2015 | Gameplay | List of REQ cards/Certifications
- 09/18/2015 | Gameplay | List of REQ cards/Weapon Skins
- 09/18/2015 | Gameplay | List of REQ cards/Assassinations
- 09/18/2015 | Gameplay | List of REQ cards/Stances
- 09/18/2015 | Gameplay | List of REQ cards/Armor
- 09/18/2015 | Gameplay | List of REQ cards/Emblems
- 09/18/2015 | Gameplay | List of REQ cards/Visors
- 09/19/2015 | Gameplay | List of REQ cards/Helmets
- 09/19/2015 | Gameplay | List of REQ cards/Vehicles
- 09/19/2015 | Gameplay | List of REQ cards/Power Ups
- 09/19/2015 | Gameplay | List of REQ cards/Arena Boosts
- 09/19/2015 | Gameplay | List of REQ cards/Warzone Boosts
- 09/25/2015 | Multiplayer Map | Altitude
- 09/25/2015 | Multiplayer Map | Gambol
- 09/25/2015 | Armor | BUCCANEER-class Mjolnir
- 09/25/2015 | Multiplayer Map | Trident
- 09/27/2015 | Weapon | Splinter grenade
- 09/27/2015 | Trailer | Halo 5: Guardians A Hero Falls trailer
- 09/28/2015 | Armor | ANUBIS-class Mjolnir
- 09/28/2015 | Armor | CYPHER-class Mjolnir
- 09/28/2015 | Armor | FREEBOOTER-class Mjolnir
- 09/28/2015 | Armor | GOBLIN-class Mjolnir
- 09/29/2015 | Armor | HELLCAT-class Mjolnir
- 09/29/2015 | Armor | INTERCEPTOR-class Mjolnir
- 09/29/2015 | Armor | JUMPMASTER-class Mjolnir
- 09/29/2015 | Armor | LEGIONNAIRE-class Mjolnir
- 09/29/2015 | Armor | MAVERICK-class Mjolnir
- 09/29/2015 | Armor | NOMAD-class Mjolnir
- 09/29/2015 | Weapon | Oathsworn
- 09/29/2015 | Weapon | Chaingun turret
Advanced to level Lieutenant at 20,000 points!
- 09/29/2015 | Weapon | Gauss turret
- 09/29/2015 | Weapon | Rocket pod turret
- 09/29/2015 | Weapon | Whispered Truth
- 09/29/2015 | Vehicle | Wargoose was deleted due to the lack of information regarding it (it's possible this was a pre-release codename for the new Gungoose)
- 10/16/2015 | Glitch | Lightrifle Crawler
- 10/17/2015 | Character | Promethean Warden