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Welcome to Halopedia, the Halo wiki and definitive source for Halo information that anyone can edit. This encyclopedia is edited and maintained by a dedicated group of Halo fans! We are currently working on 16,389 articles created since November 4, 2004, and you can help us! Sign up or login to receive exclusive features and customization. Check out the new pages, recent changes, and statistics. Don't know what Halo is? Then read our summary here! If you've never been here before, you can find out more by checking out the about page. You can also find us on social media or our Discord server.


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NAVIGATION
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  • Get to know Halopedia's administators!
  • Check out the forums to see what the community is working on, to give feedback or just to say "hi".
  • Chat with the Halopedia community on our Discord server.

  • The Community Portal is the central place to find out what's happening on Halopedia. Learn what tasks need to be done, what groups can be joined, and get or post news about recent events or current activities.
  • Questions? If you have questions you can post them at the Main Page discussion or at the Community Portal discussion.
  • Get to know Halopedia's administators!
  • Check out the forums to see what the community is working on, to give feedback or just to say "hi".
  • Chat with the Halopedia community on our Discord server.
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Official news

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Article Improvement Drive is a community project to improve the wiki's content through bringing articles in dire need of improvement—from cleanup to content expansion and updates—to everyone's attention. Anyone is welcome to participate in the project!

A small sampling of articles in need of new content:

The following articles for Halo media could use the addition (or completion) of a plot synopsis:


See the AID project page for more information!

Did You Know?
  • ...that the Covenant produced an AI capable of thinking for itself and betraying its masters?
  • ...that the Covenant's founding document was known as the Writ of Union?
  • ...that the causality violations generated by faster-than-light travel are healed through a process known as reconciliation?
  • ...that the hard sound rifles, used by ONI assassins, kill instantly and leave no entry wounds?
  • ...that Microsoft named the first of their Project Natick computers after a character from i love bees?

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Battle of Installation 04

The Battle of Installation 04, also known as the Halo Event, was a series of skirmishes between the United Nations Space Command, the Covenant, and the Flood on the surface of Alpha Halo, a Forerunner megastructure orbiting the gas giant Threshold. It marked the turning point of the Human-Covenant War, starting a series of events that would lead to the destabilization of the Covenant, the reawakening of Forerunner artifacts, a resurgent invasion by the Flood, and eventually humanity's rescue from extinction.

In the year 2552, the fleeing cruiser Pillar of Autumn discovered the ancient structure, abandoned for millennia. Pursued by alien starships, a battle ensued between humans and the Covenant for control over the Halo, until their conflicts freed an ancient parasite that sought to escape the ring.


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The Office of Naval Intelligence (ONI, commonly pronounced phonetically as /oʊni/) is the intelligence service of the UNSC Navy.


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Marine: "I think we lost him"
John-117: "Not Yet."
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