This refers to a specific iteration of a popular survival game mode initially featured in the Call of Duty franchise, adapted for the Apple iOS operating system. It involves players cooperating to withstand waves of increasingly difficult zombie enemies on a confined map, purchasing weapons and unlocking new areas as they progress. The mobile version sought to replicate the core gameplay loop of its console and PC counterparts on a smaller, touch-based platform.
The availability of this game mode on mobile devices extended the accessibility of the established Call of Duty brand to a wider audience, particularly those who primarily engage with gaming on smartphones and tablets. It provided a portable, on-the-go experience, allowing players to participate in the cooperative zombie survival gameplay anywhere with an internet connection. Its release also contributed to the overall popularity and longevity of the Call of Duty Zombies sub-franchise, demonstrating its appeal beyond traditional gaming platforms.