The universe of Halo is remarkably vast in scale and astonishingly elaborate in detail, telling rich stories filled with bold characters, breathtaking worlds, and thrilling conflicts. In celebration of the 20th anniversary of Halo, Dark Horse and 343 Industries have teamed up to deliver the most definitive guide to the universe thus far. The Halo Encyclopedia Deluxe Edition holds some of the Halo universe's greatest secrets, which is why it is contained within a Forerunner cylix--a device that holds their civilization's greatest secrets! The Deluxe Edition also comes with a cover exclusive to this edition, as well as a lithograph not found anywhere else.