Both teams believe this Soviet soldier who closed the portal at Die Maschine's Projekt Endstation will be the key to dealing with the Forsaken, a powerful force that exists in the Dark Aether. Requiem and Omega Group are now both fighting to extract Sergeant Kazimir Zykov from the Dark Aether. The map is called Forsaken, and this round-based Zombies experience will conclude the Cold War storyline of the CIA Requiem research team's efforts to stop the Omega Group, who are responsible for all the Dark Aether portals and zombie outbreaks. Call of Duty Season 6 is starting on October 7, and Treyarch's blog post revealed the details for Black Ops Cold War's final Zombies map that arrives with the launch of the new season.