Zombies are recurring antagonistic creatures in the Biohazard (Resident Evil) series, known for their mindless aggression and insatiable hunger for human flesh. Created as a result of viral outbreaks engineered by the Umbrella Corporation, these undead beings serve as the primary threat to protagonists throughout the series. Their slow movements and sheer numbers make them dangerous obstacles, embodying the horror and survival themes that define the Biohazard universe.