In the beginning the galaxy was run by the forerunners but soon a race called the Flood attacked the forerunners. So the forerunners built seven large arks known as the halos. When they activated the halos they disappeared. Thousands of years later they invented the unsc and the Spartan. Sooner or later they found john-117(masterchief). After that masterchief went to planet reach and from there halo combat evolved started.
To put it as simply as possible when the forerunners created the rings they also created shield worlds. These shield worlds were refuges from the affects of the halo rings one of the forerunners informed the flood of this so the flood went to one shield world and survived on beings who were living there. Later the covenant discovered this world tried to use the forerunner fleet on the surface of this shield world the UNSC followed and got inside purely accidentally, as seen on Halo Wars. Therefore freeing the Flood. Hope that helps :)
Halo doesn't stand for anything. it means the halo rings that the forerunners used to destroy the flood. then later Master Chief used it to destroy the flood also.ORH.A.L.O. stands forHighAltitudeLowOpeningWhich makes reference to the altitude that the special ops team jump out of the deployment aircraft and the low altitude (after which) that they deploy their parachutes.
The halos, or scientifically, the installations were a way of getting rid of the flood, a parasitic life-form that infects any living thing it consumes. And you're probably wondering how they got rid of the flood. Well, the halo rings would be fired and destroy everything in range, starving the flood to death. A race of alien species known as the Forerunners built these rings. There were very advanced in technology, but the flood caught them off-guard. The Forerunners finally fired the rings, and suddenly vanished from existence. Hundreds of thousands years later, a Slip-space starship wandered into an unknown region trying to lure an alliance of alien species, the Covenant, away from Earth, and the Master Chief was forced to find the secrets of the Forerunners' extinction and the Halo rings.
after Halo reach,there is no more In total, there is :Halo 1,Halo 2, Halo 3, Halo ODST, Halo wars and Halo reach
Random journal entrys from the forerunners
The forerunners built it even before our time and before the covenant.
A halo ring is a giant weapon designed by the forerunners to destroy all of the galaxy or in other words a big nuke.
Halo the game: 2003. Halo the ring: the time of the "Forerunners". HALO:CE( THE FIRST HALO GAME), ACTUALLY CAME OUT NOVEMBER 15, 2001. 2003 IS WHEN IT FIRST CAME OUT ON PC.
Halo 4, master chief lands on a forerunner planet. which awakens a new breed of enemy derived from the forerunners called, "Promethean"
Halo can't die. It is an custom made ring-planet built by the forerunners. So it can only break apart like the way it did in the end of Halo: Combat Evolved.
The Forerunners are an ancient race that made 343 Guilty Spark, Halo and the flood. When the flood started to reproduce dramatically in years before even Halo Wars (2531), the forerunners made mechanical things and oracles like Guilty Spark, and then killed everything on the planet, including themselves and the flood. All that's left of them are a few of their buildings, oracles and sentries, which try to kill you in halos 1-3.
When the forerunners built the Halo's, they built them with awesome powers. As the history of the halo go's, there are only eighteen in existence. After all the forerunners vanished, the halo's were lost in space, until over a thousand years later. The covenant found 1 ring and found the powers of it. They set a devoted there lives to finding all of them and activating them to have the galaxy all to them.
Search on google imgaes or look on the halo wiki. Their faces are never seen but thay appear tall with a similar build to a human.
In the beginning the galaxy was run by the forerunners but soon a race called the Flood attacked the forerunners. So the forerunners built seven large arks known as the halos. When they activated the halos they disappeared. Thousands of years later they invented the unsc and the Spartan. Sooner or later they found john-117(masterchief). After that masterchief went to planet reach and from there halo combat evolved started.
They designed it to withhold the flood, or even eventually destroy them. The 'Halo' was designed as a weapon against them. I don't want to spoil the story so I'll stop there.
apparently the precursors are the ANCIENT FLOOD! (the precursors are beings that lived before the forerunners, and were also the enemies of them)