Find a cure for the common Cold War in “Classified”, the DLC map for Black Ops 4: Zombies. Here’s how to get all four hidden codes.

Transform the Hell’s Retriever into the Hell’s Redeemer in “Blood of the Dead” — here are all the secret steps you need to make the infinite use tomahawk even better.

Here’s how to create the powerful Death of Orion (and Serket’s Kiss) Wonder Weapon in “IX”, the coliseum-themed Zombies map in Call of Duty: Black Ops 4.

Construct the Shield Wonder Weapon on all Zombies maps included in Call of Duty: Black Ops 4. Here’s where you need to look to get all the hidden, randomly-spawning parts.

Get an overpowered, acid-spewing super-shotgun in the Black Ops 4: Zombies map “Blood of the Dead” with these Acid Gat kit locations.

Learn where to find all the shield parts and how to activate the disabled Pack-a-Punch machine on the roof in “Blood of the Dead’, one of many new Zombies maps in Black Ops 4.

Unlock enhanced weapons before you sink under a sea of zombies in “Voyage of Despair”, the Titanic-themed map for Black Ops 4: Zombies.

Get a returning weapon from the original “Mob of the Dead” map in Call of Duty: Black Ops 4. Here’s how to get Hell’s Retriever, a tomahawk that boomerangs back after every throw.

Secret songs are back! Listen to “Shockwave”, a hidden Easter egg song on the Black Ops 4: Zombies “Classified” map. You just need to find some hidden vodka bottles.