A Halo Ring.

A Halo Ring is a large installation created by the Forerunners. It was built to destroy the Flood.


When the Forerunners were still around, they were invaded by the Flood. At first, the Forerunners thought they could fight off the Flood, but they couldn't. Instead, they built the Halo Rings, which would destroy all sentient life in the galaxy. Samples of DNA from each species were kept safely, so after the blast, the galaxy could be repopulated.

Ring characteristicsEdit

Each Halo ring has it's own unique landscape and characteristics.

Installation 00 (The Ark)Edit

Visited in Halo 3. The central firing pont for all the Halos, The Ark's landscape includes deserts, forests, oceans, and an Earth-like atmosphere.

Installation 01Edit

Seen in hologram form in Halo 3, this installation's environment is endless desert and has limited atmosphere.

Installation 02Edit

Seen in hologram form in Halo 3, this installation's environment is water and ice-based with rocky outcroppings.

Installation 03Edit

Seen in hologram form in Halo 3, this installation has a red, cracked surface, indicating vast seserts and volcanic acrivity.

Installation 04 (Alpha Halo)Edit

Visited in Halo: Combat Evolved and Halo: Combat Evolved Anniversary, this installation has forests, caves, mountains, blizzard-like deserts, and an Earth-like atmosphere. Installation 04 was destroyed by Master Chief.

Installation 04BEdit

A near-identical yet unfinished replacement for the destroyed Installation 04, this installation's weather control was not yet online. As a result, the majority of the ring visited was only snow. This installation was destroyed by Master Chief.

Installation 05 (Delta Halo)Edit

Visited in Halo 2, this installation's environment mostly consisted of forests, rivers, and ruins. After a massive Flood outbreak, the surface of Installation 05 was glassed.

Installation 06Edit

Seen in hologram form in Halo 3, this installation is colpletely barren and rocky.

Installation 07Edit

First feen in hologram horm in Halo 3 and later as the primary setting for the novel Halo: Primordium, this installation's environment is mostly desert with a harsh atmosphere.

Installations 08-12Edit

In Halo: Combat Evolved Anniversary, 343 Guilty Spark makes note of, in a terminal, that there were originally 12 Halo rings, but 5 were destroyed (leaving 7 and the Ark).

On the ringEdit

On the inner side of the ring is a large structure built to simulate a planet. It has continents and oceans. There are also simulated weather conditions like rain, snow, and so on. Somewhere on this part of the ring is the control room, where the ring can be fired.


The inner side of the Ringworld.


You can see the rest of the ring from the landscape below.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.