Call of Duty: Black Ops 4 has been out for a couple of days now, giving fans of the franchise the opportunity to play through Specialist missions, battle it out in the online multiplayer mode, try to survive in the Blackout battle royale mode, and of course, face off against the undead hordes in Zombies. The game launches with three Zombies maps available in the standard edition, but there is actually a fourth Zombies maps that players can get right now if they have the cash.

The fourth Zombies map is called Classified, and it is actually a remake of the map "Five" from the original Call of Duty: Black Ops. Five was famous for allowing players to play as Cold War-era political figures, including John F. Kennedy and Fidel Castro. However, Classified in Call of Duty: Black Ops 4 replaces them with the original Zombies cast, meaning players have the chance to yet again play as Edward Richtofen, Nikolai Belinski, Takeo Masaki, and Tank Dempsey.

Unfortunately, there is no way to unlock the Classified Zombies map in-game, and at the time of this writing, it can't be purchased as standalone DLC. On the contrary, the only way for players to get the Classified map in Call of Duty: Black Ops 4 is to purchase the Black Ops Pass, which is the game's $50 season pass.

While that price is a little steep, it's worth pointing out that the $50 won't just unlock Classified. It also will give players instant access to future DLC as well, including new multiplayer maps, Zombies maps, Specialists, and more. So while some may scoff at the $50 season pass for Black Ops 4, those that plan on playing the game quite a bit may very well get their money's worth.

Other Call of Duty: Black Ops 4 players may be satisfied with what comes with the base game and may not be interested in Classified or future DLC. If so, they still have three Zombies maps to play on, so they should have no shortage of undead monsters to slay.

Call of Duty: Black Ops 4 is out now for PC, PS4, and Xbox One.