Halo 3 Essentials is an extra pack in disc from the Halo 3 Lenendary Edition that is able to played on any DVD player (does not have to be used with an Xbox). It includes many extra features to include the following:

• Only included in the Halo 3 Legendary Edition.
• Completely remastered, high resolution versions of the Halo and Halo 2 cinematics with 5.1 audio and an optional “Director’s Commentary” track featuring Martin O’Donnell, Joseph Staten, and Jason Jones.
• Bestiarum: An expanded digital guide to the creatures, cultures, and worlds of Halo 3, with art and assets exclusive to this interactive edition.
• The Cortana Chronicles: Jen Taylor, the voice of Cortana, takes us on a tour of the worldwide Halo fan community, where she meets Halo fanatics from near and far, obscure and famous alike.
• All-new, exclusive Machinima episodes from Red vs Blue and This Spartan Life, as well as a novel “mockumentary” voiced by Sgt. Johnson himself, David Scully.
• And more!