After turning on the power, Operators will need to occasionally defend it from massive waves of zombies that materialize out of rifts from Dark Aether surges. Enter the all-new Assault Rounds game mechanic, the first of its kind in Zombies.
Luckily for survivors, these rifts will appear in one of three heavily fortified locations: the Scorched Defense (north), Rocky Defense (east), or Jungle Defense (south). Each of these areas has a special fire control terminal with a specific Support – a Napalm Strike, Cruise Missile, or Artillery – that must be defended from the horde. Should you have enough Essence, additional versions of that specific Support item can be bought during an Assault Round.
When an Assault Round begins, Operators must rush to the designated Defense area, either by foot or by using one of several Jump Pads that can land them right at a defense point for a small Essence fee. Once they reach this point, they must quickly prepare to hold the line against the horde, as the automated Sentry Turrets are not enough to keep the terminals from being destroyed. Zombies will pour out of one of several rifts down range from the fortified defenses, rushing out of the portal in a cluster until they reach the first line of plowshares. At that point, they will fan out in order to overwhelm defending Operators.
Of course, eliminating the undead as soon as they exit the portals is one optimal strategy to surviving these Assault Rounds. With this strategy in mind, sniper rifles and launchers, weapons that may not be ideal in the frequent close-quarters situations of a normal Zombies round, become viable options to deal with these threats before they come close to these defenses. Otherwise, it may be best to save your loadout’s most powerful weapon, any Field Upgrades, and as many Support items as possible for these rounds in order to have the best chance at outlasting the undead blitz.
After successfully completing an Assault Round, several power-ups such as Double Points, Max Ammo and Salvage will spawn at the terminal’s location, which will help in following rounds.