Call of Duty: Vanguard is a Second World War game by Sledgehammer Games, and its Zombies mode was made by Treyarch. The story goes back to 1944, before Die Maschine: Allied Special Forces led by the demonologist Gabriel Krafft fight the undead army of the SS officer Wolfram Von List, bound to Kortifex the Deathless, a fallen lord of the Dark Aether. Elder Gods of the Dark Aether who stand against Kortifex take their side.
Vanguard launched with Der Anfang, then Terra Maledicta, two maps built on objectives rather than rounds. Round-based Zombies only came back in Season Four with Shi No Numa, a reimagined World at War classic, and the mode closed in Season Five with The Archon. These two round-based maps have their First Room board here, from solo to four players.