https://youtu.be/khYaJYHcIpY
No! You will not need to have purchased COD: Black Ops Cold War to enjoy the Zombies Mode free week, which will take place between
January 14 and 21, 2021.
Within the aforementioned period, you must search for the item
"Zombies Free Access" in the respective store of your platform (PlayStation 4, Xbox One, PlayStation 5, Xbox Series X or PC, via Blizzard).
For those who will play for free, multiplayer will not be enabled, but it will be possible to enjoy 3 game modes:
Die Maschine

An abandoned World War II laboratory in Poland containing a massive particle collider has opened a rift to inexplicable monstrosities and undead living forces. As part of the international response team known as Requiem, you will infiltrate the DZ and attempt to survive waves of zombies through various rounds as you uncover the secrets of "Die Maschine", or exfiltrate early with your life intact (and some great rewards to boot).
With its starting area paying homage to the original map
world at War Zombies that started it all, "Die Maschine" is a round-based Zombies experience where up to four players can spawn in and try to survive the horrors that await. Work together using dozens of weapons, lethal and tactical equipment, powerful Scorestreaks, and special field upgrades – such as an Energy Mine or instant healing through Healing Aura – that charge up by killing zombies.
Unlocked some new weapons
from the Cold War through the Battle Pass system? Bring them into the fight via your starting loadout and upgrade them along the way. You can also equip yourself with a variety of Wall Buy weapons, take a risk with a random weapon pulled from the Mystery Box, or give any weapon a serious boost through the Pack-a-Punch Machine.
Cranked

Need a little more urgency to stay alive in "Die Maschine" besides being overwhelmed by waves of zombies? Give Cranked a try.
As usual, you and your squad will drop in with a loadout of your choice. However, once the first zombie hits the ground, the Cranked Timer starts ticking down. Your Operator will explode if you don't kill another zombie before the timer hits zero, and the timer gets shorter and shorter as the game progresses! Keep an eye out for the Cranked Hardpoint, which temporarily freezes the timer for all players.
Watch the clock—and your six—to survive this new zombies game mode... and make sure to put the local ping system to use when playing with your squad.
Onslaught (PlayStation* Exclusive)

PlayStation players can also access Onslaught, the new two-player zombies experience on multiplayer maps in
Black Ops Cold War.
In this mode, your duo will use whatever is in their loadouts to fight against hyper-aggressive waves of undead forces. Unlike traditional zombies, a Dark Aether Orb will confine you to a specific space on the map until it is charged by the souls of the undead.
As the safe area shifts, expect increasingly difficult surges of enemies, including incredibly powerful elites, to test your duo's survival skills. Kill enough of these Elites, and you will earn special Bronze, Silver, or Gold rankings and exclusive weapon blueprints.
*Not available on other platforms until November 1, 2021
Click
here and check the minimum requirements to play on PC
Source:
Call of Duty
4.5