Nightfall

Nightfall is a map part of the Onslaught downloadable content pack for Call of Duty: Ghosts. It is the second level of the game mode Extinction, but was mentioned as Episode 1 of the Extinction story. It takes place after the events of Point of Contact. It was first revealed on a GameStop promotional poster and was  released on January 28th, 2014 for Xbox LIVE.

Overview
Nightfall is a map from the Extinction game mode and takes place in a snowy, deserted Alaskan base. It includes two new aliens. The first is the Phantom. While jumping, the Phantom is rendered invisible to the players. The second is called the Breeder. Not much is known about the Breeder except that it is the largest boss in the game so far, and also looks like a large, spider-like creature. There is also a new weapon, the Venom-X, that gets its ammo from the Scorpion and shoots acid similar to that of the Scorpion. There are two known main characters: Samantha Cross and Cpt. David Archer as well as the team that the players control. In the Ending Cutscene, A Unknown Cryptid is Seen, which teases the next Map of Extinction.