Call of Duty: Black Ops 4 has released to plenty of fanfare, with the latest Treyarch title both offering new content with the likes of Blackout mode and evolving traditional content like Zombies, which has been an ever-present force in the Call of Duty franchise since World at War. Gamers who picked the game up can enjoy three different Zombies scenarios in their entirety, with many fans quickly discovering a plethora of easter eggs within the undead mode.

Today, Treyarch has hyped up the fourth Zombies map, which is only available to gamers who purchased the Black Ops 4 Season Pass.

Those with the $50 pass can already access the new map, and Treyarch has just revealed a new trailer to show off what the rest of gamers are missing. The video features regular Zombies alumni Edward Richtofen, Takeo Masaki, Nikolai Belinski, and Tank Dempsey. It looks like Classified is chock-full of easter eggs too, though gamers have been slower to find them given the map's paid barrier of entry.

Classified may look familiar to veterans of the franchise since it is a reworked version of Five, one of the maps from Black Ops. Sections of the map have been changed to give things a fresh perspective (in a similar manner to Nuketown), allowing for gamers to better utilize some of the new perks and challenges.

The Black Ops pass also includes 12 new multiplayer maps, 4 additional Zombies experiences, and 4 Blackout-exclusive characters. For the uninitiated, Blackout is Treyarch's answer to the battle royale craze, and fans who want the pass-exclusive skins like Shadow Man will be forced to pay a hefty price to don the exclusive skins. Gamers who plan to spend plenty of time within the game will certainly get value for the $50 investment, and Treyarch will be hoping the above trailer for Confidential tips over a few consumers who may have been on the fence.

Call of Duty: Black Ops 4 is available now on PC, PlayStation 4, and Xbox One.