Halo.Bungie.Org (HBO) is a fansite created in 1999 by Claude Errera (known online by the pseudonym "Louis Wu", a reference to Ringworld) and two associates as a news site for the Bungie video game Halo: Combat Evolved.

The site covers all Halo properties (including those associated with 343 Industries) and posts game news, rumors, and fan art and videos.

[4] Over time one member of staff dropped out followed by another shortly after Bungie's acquisition by Microsoft, leaving Errera the sole webmaster and the main force on the site.

The site covers game news and rumors, strategy, fan-made machinima, stories and art, contests and forums.

[5] Errera attributed the site's longevity to the fact that it provided fans with not just Halo news but a place to share their love of the franchise.

[2] Errera credits the site's success to its longevity; "When you’re there from the beginning, and you add new content every day, folks tend to come back," he said.

[11][12] Errera has been interviewed numerous times by gaming sites such as Microsoft's Xbox.com[5] and mainstream media organizations such as CBS and the BBC.

The site's members took part in a massive effort by the Halo community to raise money, primarily through selling collectible items through eBay auctions.