One of the things Treyarch has been promising to add for Call of Duty: Black Ops 4 players is an all-new Zombies experience. "Ancient Evil" drops Bruno, Diego, Scarlett, and Shaw into the underground city of Delphi, but it won't be the gods that players are taking on in the Greek underground. With new mythical creatures such as the pegasus to encounter, and new varieties of zombies to defeat, players will have to set free the doomed citizens of a forgotten city. You can see exactly what to expect in the latest trailer for the DLC:

The DLC takes place after the events of IX in the Chaos saga, and promises to bring the storyline to a close. In a new DECLASSIFIED developer diary, we get a closer look at the sound design process of the entire Zombies saga as we hear about the Sound of a Story from the audio team.

"Ancient Evil" will arrive first on PlayStation 4, but as their exclusivity window is just seven days, this means the content will arrive on Xbox One on April 2nd. The DLC will be included as part of the Black Ops Pass.We've got the full list of Call of Duty: Black Ops 4 achievements - check the list for guides to unlocking them.