Characters

Player

Master Chief (gameplay)
Spartan (co-op)
Spartan (multiplayer)
Infected Spartan
Arbiter (player character)
Elite (co-op)
Elite (multiplayer)
Forge Monitor
ODST (player character)

Crewman

Crewman
Captain Keyes
Miranda
Lasky

Marine

Unarmored Marine
Armored Marine
Marine Sniper
Sergeant
Sergeant Johnson
ODST
Pilot
Trooper
ONI Security

Spartan

Spartan
Spartan Jorge
Spartan (co-op)

Civilian

Worker
NMPD Officer
Civilian
Scientist

Grunt

Grunt Minor
Grunt Major
Grunt Ultra
Grunt Bodyguard
Grunt Spec Ops
Grunt Heavy
Grunt Ranger
Heretic Grunt
Grunt Mule

Elite

Elite Minor
Elite Major
Elite Ultra
Elite General
Elite Zealot
Elite Field Marshall
Stealth Elite
Stealth Elite Major
Elite Spec Ops
Elite Ranger
Elite Honor Guard
Elite Councilor
Spec Ops Commander
Arbiter (NPC)
Elite BOB
Heretic Minor
Heretic Major
Heretic Leader
Heretic Leader Hologram
Jega 'Rdomnai

Jackal

Jackal Minor
Jackal Major
Jackal Sniper
Jackal Ranger
Skirmisher Minor
Skirmisher Major
Skirmisher Murmillo
Skirmisher Commando
Skirmisher Champion

Hunter

Hunter
Hunter (flak)
Ardent Hunter

Drone

Drone Minor
Drone Major
Drone Ultra
Drone Captain
Drone Captain Major
Drone Pupa

Brute

Brute Minor
Brute Major
Brute Ultra
Brute Captain
Brute Captain Major
Brute Captain Ultra
Brute Honor Guard
Tartarus
Brute Bodyguard
Brute Stalker
Brute Chieftain
Brute War Chieftain
Brute Jumppack
Brute Jumppack Major
Brute Jumppack Ultra
Brute Berserker
Brute Chosen Berserker
Brute Sniper
Brute Heavy Sniper
Hyperius
Tovarus
Escharum

Flood

Infection Form
Elite Combat Form
Human Combat Form
Brute Combat Form
Carrier Form
Pure Form

Sentinel

Sentinel Minor
Sentinel Major
Sentinel Captain
Monitor
Sentinel Constructor
Sentinel Enforcer
Sentinel Eradicator

Promethean

Crawler
Crawler Alpha
Crawler Snipe
Knight
Knight Lancer
Knight Battlewagon
Knight Commander
Watcher
Focus Turret
Soldier
Soldier Officer
Soldier Sniper
Warden Eternal

Other

Ambient Wildlife
Prophet of Regret
Engineer
Moa
Guta
Skimmer
Skimmer Ultra
Harbinger

Vehicles

Turret

Machine Gun Turret (man-portable)
Plasma Cannon (man-portable)
Machine Gun Turret (removable) / Chaingun Turret
Plasma Cannon (removable) / Plasma Turret
Missile Pod Turret / Rocket Pod Turret
Gauss Turret (removable)
Splinter Turret
Scrap Cannon
Shade Turret
Fuel Rod Shade Turret
Anti-Air Shade Turret
Machine Gun Turret (fixed)
Gauss Turret (fixed)
MAC Cannon

Human Jeep

Warthog
Gauss Warthog
Transport Warthog
Scout Warthog
Rocket Warthog
Mongoose
Gungoose
Forklift
Electric Cart
Pickup Truck
Truck Cab
ONI Van
Military Truck
Cargo Truck
Mammoth

Human Tank

Scorpion
Elephant

Human Plane

Pelican
Spirit
Phantom
Space Phantom
Lich

Alien Scout

Ghost
Wraith
Anti-Air Wraith
Spectre
Shadow
Prowler
Revenant

Alien Fighter

Banshee
Space Banshee
Cruise Missile

VTOL

Hornet
Transport Hornet
Falcon
Nose Gun Falcon
Grenadier Falcon
Transport Falcon
Phaeton
Wasp

Space Fighter

Seraph
Sabre
Broadsword

Other

Chopper
Mantis

Weapons

Grenade

Frag Grenade
Plasma Grenade
Spike Grenade
Firebomb Grenade
Pulse Grenade
Splinter Grenade
Dynamo Grenade

Melee

Melee
Smash Melee
Slice Melee
Cut Melee
Energy Sword
Infected Energy Sword
Relic Energy Sword
Gravity Hammer
7 Wood

Pistol

Magnum
Halo: Combat Evolved Pistol
Automag
Needler
Plasma Pistol
Mauler
Target Locator / Target Designator
Sticky Detonator
Boltshot
Sidekick
Mangler
Disruptor

Rifle

Assault Rifle
Shotgun
Sniper Rifle
Plasma Rifle
Brute Plasma Rifle
Battle Rifle
Halo 2 Battle Rifle
SMG
Silenced SMG
Beam Rifle
Carbine
Spiker
DMR
Bandit EVO
Grenade Launcher
Concusion Rifle
Focus Rifle
Needle Rifle
Plasma Repeater
Railgun
SAW
Storm Rifle
Binary Rifle
Lightrifle
Scattershot
Suppressor
Hydra
Plasma Caster
Bulldog
Commando
Pulse Carbine
Ravager
Shock Rifle
Stalker Rifle
Cindershot
Heatwave

Launcher

Rocket Launcher
Fuel Rod Gun / Fuel Rod Cannon
Plasma Launcher
Incineration Cannon
Skewer

Support

Sentinel Beam
Eliminator Beam
Flamethrower
Brute Shot

Turret

Assault Cannon
Machine Gun / Chaingun Turret
Plasma Cannon / Plasma Turret
Missile Pod / Rocket Pod Turret
Gauss Turret
Splinter Turret
Scrap Cannon

Multiplayer

Flag
Skull
Bomb
Fusion Coil
Power Seed
Data Core
Power Module

Powerup

Ammo
Health Pack
Active Camouflage / Cloaking
Overshield
Custom Powerup
Damage Boost
Speed Boost

Equipment

Auto Turret / Auto Sentry
Bubble Shield / Drop Shield
Deployable Cover / Drop Wall
Flare
Invincibility
Portable Gravity Lift
Power Drain
Rader Jammer
Regenerator / Regeneration Field
Trip Mine
Armor Lock
Evade
Hologram
Jetpack
Sprint
Hardlight Shield
Promethean Vison
Thruster Pack / Thruster
Grappleshot
Threat Sensor
Repulsor
Quantum Translocator
Shroud Screen
Threat Seeker

Technical