Pre-Xbox Halo

Before Xbox, and before the release of Halo: Combat Evolved, there was a game that was originally announced for the Mac and the PC as a 3rd-person shooter, simply referred to as Halo. The game development time was from around 1998 to the release of Halo: Combat Evolved, originating as a Myth-style strategy game before turning into a third person shooter, and finally being retooled as a straight-up FPS for the Xbox console. As the game evolved, several vehicles and weapons were cut and others had complete overhauls. Below are some examples of lost or heavily modified game play items.

RTS stage
Originally, Halo was going to be made an RTS for the Mac. Bungie employees had considered this version of Halo to be a clone of Myth with a Sci-Fi skin over it. At some point, the entire game was redesigned, but was still an RTS.

Units

 * Bunker - A concrete fortification that may have provided cover.
 * Heavy Trooper - Infantry units and early iteration of the SPARTAN-IIs.
 * Scoutcar A.K.A Hummer - An early version of the Warthog featuring a pair of roof-mounted machine guns.
 * Zedsu - A conventional-looking main battle tank.
 * Stalker - A heavier, camouflaged tank.
 * Alien Tank A.K.A Horseshoe crab tank - A large, brown tank. Its design may have inspired the later Seraph.
 * Forerunner Tank - An asymmetrical armored vehicle
 * Mowitser - Assumably a mortar/howitzer hybrid artillery unit.
 * Aliens - The precursors to the Covenant in the final game.
 * Starfighter - An aerial vehicle.
 * Ghost - Early iteration of the Ghost RAV.
 * Other unidentified vehicles - Vehicles similar in appearance to Halo Wars vehicles, such as the Wolverine, Rhino and the cut Cougar.

Gallery
File:Oldhalo rts testing.png|The game being tested. File:Oldhalo rts 1.png|The Zedsu tank with some heavy troopers (Note that "Groundblast" is selected). File:Oldhalo rts 2.png|Heavy troopers File:Oldhalo rts 3.png|Scout cars, the stalker tank, an APC, horseshoe crab tanks, the Mowitser, and heavy troopers. File:Oldhalo rts longsword topright.png|Scout cars, a stalker tank, horseshoe crab tanks, heavy troopers, the Mowitser, the starfighter, and some propane tanks. File:Oldhalo rts 5.png|A heavy trooper (left) and a destroyed scout car (right). File:Rts Stalker tank.png|The Stalker Tank is selected by the player. File:Rts Mowitser.png|The Mowitser is selected (Notice the Starfighter in the top left). File:Oldhalo rts 6.png|The redesigned UI. File:Rts redone.png|Multiple units lined up (Notice how most of the models are untextured) File:Rts redone 2.png|Another image of the vehicles (Notice the propane tanks on the bottom right) File:Rts firebase.png|A base of some sort 

RPG Stage
At some point during development, Halo was to be a continuous RPG.

3rd-person action game stage
Eventually, Halo became a 3rd person action game. These builds of the game are much more similar to the final product than previous builds. Very early versions of the 3rd person version of Halo used many assets from the RTS version.

Weapons
The weapons of this build of Halo used names that were inspired by the Marathon series. All weapons were named by Robt McLees.
 * MA-5 ICW/30mm CQL - A 42-round assault rifle with an integral (assumably caseless) grenade launcher. It was named in reference to the MA-75 Assault Rifle/Grenade Launcher in the Marathon series.
 * 0x877A 18F8 - An early . It was named in reference after the Alien Weapon "0xfded" error.
 * 8W899C-82 - An SRS-style rifle with a chrome barrel and large muzzle brake.
 * 12.7mm MP-99 para - A side-loading Human submachine gun with a pronounced muzzle flash. Developers referred to it as "a fire hazard".
 * WSTE-M90 Shotgun - A predecessor to the contemporary M90 shotgun, named in reference to the WSTE-M5 Combat Shotgun featured in Marathon 2.
 * SPNKR M41 88M - An early version of the SPNKR Rocket Launcher. It was named in reference to the SPNKR SSM Launcher weapons in Marathon.
 * 50 Magnum Mega Class M4a - An early version of the M6-series of pistols with an 18-round magazine. It was named in reference to the .44 Magnum Mega Class A1.
 * ASW Needler - The pre-Xbox Needler fired higher-velocity projectiles with no apparent homing ability. It used the model of the Portable Minigun.
 * SPNKR 108 8AM - A single-shot design launcher similar in concept to the G4H-DuSH. It was named in reference to the SPNKR SSM Launcher weapons in Marathon.
 * Pattern-2 Composite Sword - The machete, as featured on the difficulty shield.
 * TOZT-21 Defoliant Projector - A flamethrower that sported a similar heat shield to the portable minigun. It was named in reference to the TOZT-7 Backpack Napalm Unit in the Marathon series.
 * "The Old Shovel" - A bolt-action, bullpup anti-armor rifle that had to be reloaded after each shot.
 * Semi-Auto Shotgun
 * Portable Minigun - Handheld rotary gun with a heat shield similar to the TOZT-21 Defoliant Projector.
 * Spear Gun - A portable harpoon intended for use against against underwater enemies
 * Gravity Rifle - A Covenant sniper rifle that vaguely resembles the Type-50 particle beam rifle, its spiritual successor.
 * Alien Sniper Rifle - A Covenant sniper rifle that resembles an elongated.
 * Excavator - A drum-fed, Fuel Rod-based weapon that resembles the Mauler.
 * Unidentified Covenant Grenade Launcher
 * Gravity Wrench - A charge-operated Covenant heavy weapon.
 * Fuel Rod Gun - Resembles the Fuel Rod Cannon found in Halo: Combat Evolved.
 * Fuel Rod Cannon - A Covenant Rocket Launcher equivalent resembling the Fuel Rod Cannon from Halo 2.
 * Energy Sword

Vehicles

 * Warthog - Early versions of the Warthog
 * Rocket Warthog - A warthog that fires anti-armor missiles (resembles the Gauss Hog)
 * Scorpion - An early Scorpion Tank that has a missile launcher on the side instead of machine gun turret.
 * Stealth Tank - A tank with a low profile and counter vented fire stabilization.
 * Heavy APC - A heavy APC similar to the Elephant.
 * Helicopter - A Helicopter that was present in very early builds.
 * Pelican - The standard Pelican.
 * Boat - A boat that was referred to as the "Dual Carrot Craft" by Bungie Employees.
 * Ghost -The.
 * Shadow - An early version of the, that had a Shade Turret on the back instead of a
 * Wraith - The Wraith Mortar Tank
 * Banshee - Early versions of the Banshee
 * Covenant Bomber - A cut Covenant Bomber

Production notes

 * In the early versions of Halo, the secondary weapon the player obtained would be placed on their back, though this feature was not present in the final release of Halo: Combat Evolved and Halo 2. This concept was finally introduced officially in Halo 3.
 * At some point during development, Blind Wolves were intended to be rideable.
 * It would seem that at some point the development team intended underwater enemies to be present in the game, as a harpoon gun existed in these early builds of the game
 * In the Evolution of Halo Part 1, there is a Warthog and an ATV that both lack mounted armaments for defense. Both were later planned to be introduced to Halo 2 but dropped and finally added into Halo 3.
 * Though the Gatling Gun is not in Halo: Combat Evolved, there have been several mods, using Halo Custom Edition, that have integrated the Gatling Gun into the game. Most if not all of these mods use the Warthog's turret model, separated from the base and the main vehicle.
 * Engineers were originally going to be introduced in this game but, like most of this material, was ultimately absent from the final product.
 * Though closer to the final product, the E3 2000 build is actually still a pre-Xbox Halo build

Trivia

 * The Marathon logo was incorporated into the old Heads Up Display.
 * An exit game screen existed that asked the player whether or not they wanted to "Retreat from Chucky's Love".
 * In the early stages of the game, the Halo Ring was designed to be in broken or incomplete in appearance, only attached by strands of skeletal supports in some areas, not unlike Installation 08's appearance in Halo 3
 * The Elites originally lacked the style of armor present in the actual games, with some form of Exo-Skeleton or Tech-Suit instead. They also possessed mandibles that are "more dinosaur-like", rather than having a four-pronged jaw.
 * Sharquoi were intended to feature as a Covenant or wildlife unit.

Gallery
File:PXH CGW1999Cover Screenshot.jpg|Image sent to CGW magazine 1999. File:PXH FirstOfficial Screenshot.jpg|The first ever official Halo screen 1999. File:PXH_SecondOfficial_Screenshot.jpg|The second official screenshot. File:PXH MacheteSwordBattle Screenshot.jpg|A machete and an Energy Sword File:Early 3rd person.png|A very early build of this version of Halo. File:PreXbox_Ring.jpg|"It's a little prelude to what happens in the future."

- Bungie employee

File:Prexbox exit screen chucky's love.png|"My favorite UI screen to exit the game!"

- Marcus Lehto

File:Pre-Xbox Halo 2000 advertisement.jpg|A 2000 advertisement for what the game Halo is about. File:PXH RingVista Screenshot.jpg| 

Human
File:PXH ChiefChaingunPose Screenshot 2.jpg|The original Gatling Gun File:PXH ChiefChaingunPose Screenshot.jpg|Another picture of the Pre Halo Minigun. File:Early 3rd person 2.png|Two Spartans from the early builds. File:PXH MA5OICW GrenadeLauncher Screenshot.jpg|Assault Rifle with integral grenade launcher. File:Prexbox MC.png|The Assault Rifle File:Prexbox ar.png|Yet another picture showcasing the Assault Rifle File:PXH SpearGun Screenshot 2.png|Spear Gun. File:Prexbox harpoon gun.png|Another picture of the spear gun File:PXH AARocket Screenshot 1.png|Surface to Air Missile Launcher. File:PXH AARocket Screenshot 2.png|Another picture of the Surface to Air Missile Launcher. File:Prexbox spnkr.png|Anti-Armor Rocket Launcher File:PXH BoltActionRifle Screenshot 1.png|The "Old Shovel" sniper rifle File:Prexbox shotty.png|The original shotgun. File:PXH SMG Screenshot 1.png|The SMG File:Pre xbox magnum.png|The original magnum File:Prexbox flame.png|The TOZT-21 Defoliant Projector being fired. File:Prexbox flamethrower.png|The flamethrower. File:Prexbox flamethrower 2.png|The flamethrower in action. File:PXH Machete Screenshot 2.png|The weapon labeled "Pattern-2 Composite Sword". File:PXH Machete Screenshot 1.png|Another picture of the Pattern-2. File:Shotgun2.jpg|A later version of the Shotgun. File:Carrotboat.png|The "dual-carrot" watercraft was cut from the pre-production of the game. File:Prexbox chopper.png|The Helicopter as seen in the very early build. File:Heavy apc.png|A screenshot of the early build (Notice the Heavy APC on the top right) File:Hog.jpg|The Pre-Halo Warthog File:Prexbox warthog.png|The Warthog being driven by the player File:Prexbox rocket hog.png|The original rocket hog as seen in the E3 2000 Trailer File:Prexbox warthog 2.png|The turret's reticle File:Prexbox warthog 3.png|While driving, the player had the ability to control both the warthog and the turret File:PreH1-Scorpion.jpg|The Scorpion File:Prexbox Husk.png|The Stealth Tank. File:Stealth tank.png|The Stealth Tank being driven by the player. File:Stealth tank + hog.png|A Stealth Tank and a Warthog as seen in the early build. File:E3 2000 pelican.png|The Pelican as seen in the E3 2000 Trailer 

Covenant
File:PXH MacworldElites Screenshot 1.jpg|An Elite model circa 1999. Note the Elite in the background, seems to be holding an old Fuel Rod Gun model. File:HCE ShotgunEngineers Screenshot.jpg|Early render of an Engineer and a more up-to-date render of Master Chief File:Shieldandswordeq0.png|An elite from the E3 2000 build wielding both an energy sword and an unidentified energy shield File:Sniper.png|A Cut Covenant Enemy File:HCE Tankbeast Render.png|Another (presumably Covenant) Enemy File:HCE Drinol Render.png|The Covenant Drinol, now known as the Sharquoi File:Drinol 1.png|The player encounters a Drinol File:Halo 1 Drinol.jpg|The player fights a Drinol File:PXH CovenantRifle Screenshot 1.jpg|The Covenant Sniper Rifle File:PXH GravityWrench Screenshot 1.png|The Gravity Wrench File:PXH ParticleBeamRifle Screenshot 1.png|Another Covenant Sniper Rifle File:PXH ConcussionGun Screenshot 1.png|An unidentified Covenant grenade launcher File:PXH Excavator Screenshot 1.png|The excavator grenade launcher File:Prexbox fuel rod.png|The original Fuel Rod Cannon File:Pre_Halo_Needler.jpg|The original Needler. File:Halo Spectre Concept.jpg|An early version of the, then called the Shadow. File:Covenant bomber (fore view).png|A cut Covenant Bomber as viewed from the front 

Wildlife
File:Blind wolf - deletemat (textured).jpg|A Blind Wolf File:Blind Wolves.jpg|Marines in a warthog encountering a pack of Blind Wolves File:Blindwolf ride.png|A player riding a Blind Wolf File:Pre-Xbox Halo Thorn beast 1.png|A Thorn Beast File:Dinosaurs.jpg|Marines encountering Thorn Beasts File:HCE Threeleg Render.png|A "Threeleg" File:HCE Vulpard Render.png|A Vulpard File:HCE Thorax Render.png|A Thorax File:PXH RockWorm.png|A worm creature with an appendage like a rock in the head. 