Despite its long history, Call of Duty Zombies has only had two true leveling systems over the years. The first appeared in Call of Duty: Black Ops 2, while the second was used from Call of Duty: Black Ops 3 onward. While most fans will remember the modern system, as the only other style the mode has featured was only used in one game, it would be great to see it appear in the future.
If rumors are true about there being a standalone Call of Duty Zombies game next year, there would be a perfect opportunity to bring back a more unique leveling system. After all, this hypothetical game would not be tied to a multiplayer mode or Call of Duty: Warzone, so there would be no need for shared progression and leveling. A fully unique system could be introduced once again, with Treyarch possibly adding something more intriguing than basic XP levels.
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Not only did Call of Duty: Black Ops 2 did not only release some of the best and worst Zombies maps of all time, but it had many systems that made it memorable. This includes the way that it handled levels, with players able to go up and down the ranks based on their performance. This instantly made the system unique, as players had a reason to perform well since they were at constant risk of being deranked by the game.
While the system was poorly explained, leaving it up to players to determine how exactly levels were gained and lost, the idea was fairly simple. Players wanted to get lots of kills, minimal downs, and reach high rounds to level up. CoD Zombies fans could achieve eight ranks, moving from a single bone to a skull with shotguns. Players would get a tally mark added by their icon each day they played,
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