- 14 Years After E-Day
- 1st Ephyran Engineers
- 25th Sherrith Cavalry
- 26 RTI Special Tactics Group
- 26th Royal Tyran Infantry
- 2nd Battalion Royal Ephyran Engineers
- 2nd Gamma Squad
- 3rd Ephyran Engineers
- 4th Ephyra Light Infantry
- 4th Infantry Division
- 501st Legion
- 5th Kaian Grenadiers
- 6th Brigade
- 7th Mangler Unit
- 802nd Raven Squadron
- 81st "Brash" Brigade
- 858th Raven Division
- 9th Division
- A.I. Construct
- A. Guinot
- A. Josefson
- A. Simmons
- A. Sullivan
- A2897
- APC-142
- APC-One
- APC-Three
- APC-Two
- APC-Two-Eighty
- AX-331-2
- A Company 26th Royal Tyran infantry
- A Few Complaints
- A Few Snags
- A Real Gun
- Aaron Griffin
- Aaron Hulett
- Aaron Painter
- Abandon Ship
- Abandoned Airport
- Abandoned Mine
- Abandoned Research Facility
- Abyssal trench
- Academy
- Acastu Imulsion Fields
- Achievements
- Act 1
- Act 1: Ashes
- Act 1: Tip of the Spear
- Act 2
- Act 2: Denizens
- Act 2: Nightfall
- Act 3
- Act 3: Belly of the Beast
- Act 3: Gathering Storm
- Act 4
- Act 4: Hive
- Act 4: The Long Road Home
- Act 5
- Act 5: Aftermath
- Act 5: Desperation
- Act I
- Act I: The Museum of Military Glory
- Act II
- Act II: Halvo Bay Military Academy
- Act III
- Act III: Seahorse Hills
- Act III (Gears 5)
- Act III (Gears of War 4)
- Act II (Gears 5)
- Act II (Gears of War 4)
- Act IV
- Act IV: Onyx Point
- Act IV (Gears 5)
- Act IV (Gears of War 4)
- Act I (Gears 5)
- Act I (Gears of War 4)
- Act V
- Act V: Downtown Halvo Bay
- Act VI: The Courthouse
- Act VII: Aftermath
- Act V (Gears of War 4)
- Acting president
- Active Reload
- Adam Fenix's data disk
- Adam Jonathon Fenix
- Adam Lastiwka
- Adaptive Atmospheric Manipulation System
- Admiralty House
- Adrenaline Injector
- Aftermath
- Age of Armageddon
- Age of Silence
- Agent 9
- Ahman
- Aiglar
- Aigle
- Ailsa
- Airborne
- Aisha Tyler
- Akagi
- Alan
- Aldair
- Aldair Army Base
- Alderman
- Aleksander Reid
- Alex Mayfield
- Alexandra Brand
- Alexandra Silva
- Alexiy Desipich
- Alicia's Brother
- Alicia Thornber
- Alicia Valera
- Alisder Fyne
- All-Terrain Vehicle
- Allfather's Military Medal
- Allfather Prime
- Allfathers
- Allfathers Arena
- Allfathers Avenue
- Allfathers Day
- Allfathers Garden
- Allfathers Library
- Allfathers Trophy
- Almost Midnight
- Alonzo
- Alpha
- Alpha-Five
- Alpha-One
- Alpha-Seven
- Alpha-Two
- Alpha (Pendulum Wars Era)
- Alpha Company
- Alpha Squad
- Alternative energy
- Amador Park (Chapter)
- Amanda Macallister
- Ambulance
- Ambush Outside of Port Farrall
- Ambush at Sovereigns Boulevard
- Ambush at Tomb of the Unknowns
- Ambush in Central Vectes
- Ambush in Grid Charlie-Three
- Ambush of Fort Umson
- Ambush of Riftworm Village
- Ambush of South Village
- Ambush on Checkpoint Zeta
- Ambush on Hanover Coast
- Ambush on Voslov Bridge
- Ambush on the Halvo Bay Courthouse
- Amirale Enka
- Ammo Crates
- Amphibious Assault Ship
- Amy
- Anchor (Gears 5 Class)
- Anchored
- Anders Madsen
- Andius
- Andius Fusiliers Regiment
- Andros
- Angry Titan
- Anna Lidman
- Anna Meurig
- Anna Meurig's daughter
- Annalisa
- Anne Wallace
- Annex
- Answers
- Anthony Carmine
- Anthony Carmine (Action Figure) SDCC Exclusive 2008
- Anthony Deller
- Anton Chambers
- Anton Morrisey
- Anton Silber
- Anvegad
- Anvegad Pass
- Anvegad Plains
- Anvil
- Anvil Gate
- Anvil Gate (disambiguation)
- Anya Stroud
- Anya Stroud (Action Figure) Series One
- Anybody Home?
- Ape
- Arcade
- Archipelago War
- Architect (Gears 5 Class)
- Archives
- Archives Building
- Arlen Pereira
- Armadillo
- Armored Fish
- Armored Kantus
- Armored Personnel Carrier
- Armored Scion
- Armored Shark
- Arms Race
- Arnheim McLewen
- Article Template Archive
- Artillery
- Artillery Battery C
- Aryan Hanbeck
- Ascension
- Ascension (Gears of War 3)
- Ash Man
- Ashes to Ashes
- Ashes to Ashes (Chapter)
- Asp
- Asp SAM Turret
- Asper Petrell
- Aspho Fields
- Aspho Point
- Assassination
- Assassination of Ukkon
- Assault Barque
- Assault Derrick
- Assault on Franklin's Outpost
- Assault on Griffin Tower
- Assault on Ilima Savings and Trust
- Assault on Industrial District
- Assault on Jacinto City
- Assault on Landown
- Assault on Mount Kadar
- Assault on the Stroud Estate
- Assault on the Temple of the Trinity
- Assault on the Tollen Dam
- Asylum
- At the Doorstep
- Atrium
- Attack on the Sovereign
- Attorney General
- Augustus Cole
- Augustus Cole (Action Figure) Series One
- Augustus Cole (Action Figure) Series Two (GOW3)
- Aurelie Dersau
- Austere Canon
- Auto-Turret
- Autrin
- Avalanche
- Avery Hollis
- Aylmer Gullie
- Azura
- Azura (map)
- Azura Research Facility
- B.J. Haberkorn
- B. Clarkson
- B. Groth
- B. Michandani
- B. Newman
- Back in Halvo
- Bad to Worse
- Bai Tak
- Baird's Condor
- Baird Estate
- Baird Family
- Bakuaia
- Balgan
- Ball Turrets
- Bank of Tyrus
- Barak Regev
- Bardry Salaman
- Barrier
- Barriers
- Barrington Square
- Barry
- Bartlett
- Bastion
- Batsu Dominic Santiago (Action Figure)
- Batsu Marcus Fenix (Action Figure)
- Battalion Command (Lakar)
- Batten Down the Hatches
- Battle Cam
- Battle Near Jacinto
- Battle Outside of Jacinto
- Battle Trawler
- Battle for Fucked
- Battle of Andius
- Battle of Anvil Gate
- Battle of Aspho Fields
- Battle of Autrin
- Battle of Autrin (Pendulum Wars)
- Battle of Azura
- Battle of Berephus
- Battle of Bonbourg
- Battle of Bonbourg (Pendulum Wars)
- Battle of Branascu
- Battle of Centennial Bridge
- Battle of Cougars Stadium
- Battle of Downtown Ilima
- Battle of Dr. Wisen's Orphanage
- Battle of Edlar Farm
- Battle of Elliott's Mansion
- Battle of Embry Square
- Battle of Endeavor
- Battle of Estana
- Battle of Fort Umson
- Battle of Gatka Ridge
- Battle of Gerrenhalt
- Battle of Grid Echo-Five
- Battle of Haldane Hall
- Battle of Ilima
- Battle of Imtik Imulsion Rig
- Battle of Irohma Island
- Battle of Jacinto
- Battle of Jannermont
- Battle of Jasper
- Battle of Kaia
- Battle of Kinnerlake
- Battle of Landown
- Battle of Nordesca
- Battle of Noroa
- Battle of Oblivion
- Battle of Old Ephyra
- Battle of Osmium Mine Bravo
- Battle of Pelruan
- Battle of Port Farrall
- Battle of Ragani
- Battle of Shavad
- Battle of Stromson Forest
- Battle of Ukkon's Laboratory
- Battle of Vectes
- Battle of the Anvegad Plains
- Battle of the Deadlands
- Battle of the Emerald Spar Platform
- Battle of the Museum of Military Glory
- Battle of the Plaza
- Battle of the Royal Palace
- Battle of the Slab
- Battle of the Tollen Dam
- Battle of the Vectes Imulsion Field
- Battle on the Andius Highway
- Battle on the Tyro Pillar
- Baxter
- Bayou Blues
- Baz
- Baz (JACK)
- Beach
- Beached Imulsion Rig
- Beacon Grenade
- Beast
- Beast Rider
- Beast of Pahanu
- Becket
- Behemoth
- Ben Andrews
- Beneath the Surface: An Inside Look at Gears of War 2