aking place between the events of Halo 4 and Halo 5: Guardians, Halo: Nightfall is Locke’s origin story which will lend insight and understanding into the character he becomes in Halo 5: Guardians
Halo: Nightfall – First Look
updates etc…
aking place between the events of Halo 4 and Halo 5: Guardians, Halo: Nightfall is Locke’s origin story which will lend insight and understanding into the character he becomes in Halo 5: Guardians
The Halo “journey” begins in 2014 by remembering and celebrating our past. This holiday, “The Master Chief Collection” will launch on Xbox One, marking the first time the entire Master Chief story will be playable on a single console. Included with “The Master Chief Collection” is “Halo: Nightfall” an original live-action digital series that introduces a pivotal new character in “Halo 5: Guardians.” In December, the journey continues with the competitive multiplayer beta of “Halo 5: Guardians,” leading up to the fall 2015 launch alongside the Halo television series.
Gameplay demo of the classic Halo 2 map Ascension.
For the first time ever, The Master Chief’s entire story is on one console. Featuring a re-mastered Halo 2: Anniversary, along with Halo: Combat Evolved Anniversary, Halo 3, and Halo 4, new digital series, Halo: Nightfall, and access to the Halo 5: Guardians Beta, this is the definitive Halo experience. To launch the Halo: The Master Chief Collection at E3, Xbox and developer 343 Industries recreated one of the most iconic moments in the newly re-mastered Halo 2, with a twist by revealing that what the audience is seeing is a holographic projection that is being watched by a new and pivotal character in the Halo universe: Agent Locke. The more Locke studies Master Chief, the more the audience gets glimpses of Locke, and the dynamic between the characters is gradually revealed, a dynamic that will play out in the soon to be released Halo 5: Guardians.
“Halo 5: Guardians” Multiplayer Beta — Be among the first to experience a new generation of “Halo” multiplayer in the “Halo 5: Guardians” Multiplayer Beta. Gear up for the “Halo 5: Guardians” Multiplayer Beta by unlocking exclusive content in Halo: The Master Chief Collection and Halo: Nightfall. These exclusive items will carry over into Halo 5: Guardians.
cool article about halo on kotaku go check it out here

Follow the Master Chief to epic Halo locations as you’ve never seen them before…it’s time to finish the fight, Minecraft-style.
Expanding on earlier rumors, we may soon hear more about a Halo collection from Microsoft that brings together the first four games for Xbox One.

for more info check out the halowaypoint article
The Great Journey
and for some nifty wallpapers
Halo 5: Guardians wallpapers