To this day, Zombies is still one of the best and well-crafted co-op experiences you can find in video games. RELATED: 5 FPS Mechanics That Changed The Genre (& 5 That Are Outdated) Plenty of other games followed suit to create engaging horde modes that could rival the addictive nature of Call of Duty Zombies.
Ever since Treyarch showed the world Nazi Zombies in World at War, the entire gaming landscape shifted.