The first of four DLC offerings for Call of Duty: Ghosts is coming to Xbox this month.

The game’s Onslaught DLC will be available from January 29 on Xbox 360 and Xbox One, and adds four new multiplayer maps, a new weapon, and the first narrative-driven episode for the game’s Extinction mode.

The latter is called Episode 1: Nightfall, and is the first of four episodic narratives that delve deeper into the Extinction storyline. It features new characters, a new weapon, and two new alien species.

Set in a remote facility hidden deep within the Alaskan wilderness, the shadowy Nightfall Program has been researching the origins of the newly revealed alien threat. A small recon team of elite soldiers must infiltrate the site to retrieve intel and exterminate the hordes of savage creatures, and along the way uncover a three-story tall terror unlike anything they’ve faced before.

Elsewhere, Fog is a small- to medium-sized map set alongside the banks of a murky lake that serves as a homage to classic horror films. If a player happens to find and complete a specific Field Order, they become Halloween’s Michael Myers, one of cinema’s most iconic horror characters. Additionally, the entire soundscape changes to the eerily familiar Halloween theme music so other players know to run for their lives.

COD: Ghosts DLC kicks off Extinction narrative this month
COD: Ghosts DLC kicks off Extinction narrative this month

BayView is a close-quarters map set on a coastal Californian boardwalk, that offers players fast-paced run-and-gun matches. Players must also be wary of the deadly artillery strike enemies can call in from a Naval Destroyer anchored just offshore.

Containment transports players to a war-torn South American village, where the battle rages along both banks of the dried out riverbed. The action in this compact map centres on the remains of a small bridge holding a hi-jacked truck filled with leaking radioactive material. Surrounded by a myriad of abandoned bars, cafes, a church and a pool hall, Containment also features elevated rooftop vantage points for players who prefer longer-range engagements.

Ignition launches players into an aging Florida space launch facility. Inspired by Modern Warfare 2’s Scrapyard, Ignition features a massive transport crawler, rockets crash-landing into the map, and two separate rocket test engines sites that opposing forces can trigger, sending massive fireballs into the surrounding firefights.

Finally, the new weapon is the Maverick, a dual-purpose Assault Rifle/Sniper Rifle that players can choose how to use depending on their tactical needs – a first for Call of Duty. Outfitted with a lightweight wood stock, this weapon can be selected in either the Assault or the Sniper Rifle class. As an Assault Rifle the weapon’s fire rate becomes fully-automatic with high damage at a decent range, and as a Sniper Rifle the Maverick sports an advanced scope and a semi-auto rate of fire.

Onslaught is included as part of the Call of Duty: Ghosts DLC Season Pass, which will gives fans access to four DLC Packs planned to release in 2014: Onslaught, Devastation, Invasion, and Nemesis.

A release date for the PlayStation 3 and PlayStation 4 versions of Onslaught are yet to be announced.