Halo Encyclopedia (2011 edition)

This article is about the 2011 revised edition of the Halo Encyclopedia. For other editions, see Halo Encyclopedia. For the Halo Channel feature, see here.

The Halo Encyclopedia: The Definitive Guide to the Halo Universe (Revised) is the 2011 revised edition of the original 2009 edition of the Halo Encyclopedia, the original official guidebook of the Halo universe. Like its original 2009 edition, it was published by Dorling Kindersley and created in conjunction with 343 Industries. The encyclopedia has a foreword written by Frank O'Connor, head of 343 Industries, with Tobias Buckell editing. The cover of the book was illustrated by Craig Mullins.

The 2011 revised edition of Halo Encyclopedia includes an additional sixteen pages (including information on Halo: Reach.

Additions
The 2011 revised edition incorporates new content, mainly image assets, from Halo: Reach, as well as correcting some mislabeling in the original. Additions include:
 * UNSC Army Troopers on pages 56-57
 * Noble Team on pages 114-117
 * Skirmishers on pages 156-157
 * Space Combat on pages 266-267
 * Armor Abilities on pages 354-355

Errors
Despite the revision, many of the errors remain. 343 Industries Content Creator Jeremy Patenaude has acknowledged that many of the errors remain in the new edition, and stated that future efforts to create a Halo universe encyclopedia would be rewritten from the ground up.

General errors

 * The revised Encyclopedia still refers to the "First" and "Second" Battles of Earth instead of the "Battle of Earth" only, an error that came from Halopedia.
 * The erroneous terms "Covenant Loyalists" and "Covenant Separatists" are used to refer to the participants of the Great Schism. This terminology also came from Halopedia.

Individual errors

 * On page 10, it is said that the Prophet of Regret's failure to invade Earth caused the Heretics to lose faith, while Halo 2 clearly showed the Heretics had rebelled because of 343 Guilty Spark's revelations on the Halo Array.
 * On page 36, Cole's Pyrrhic victory over the Covenant at Harvest is stated to have occurred in 2531, though it took place in 2526. The Encyclopedia may have mixed this up with another, less important engagement in which Cole participated in 2531 over Harvest.
 * On page 36, it is said that SPARTAN-III Beta company Team X-Ray disappeared in Zone 67, Onyx, in 2537, while they went missing in the year 2539.
 * On page 43, it is said Odyssey was sent to colonize Reach in 2310, instead of 2362.