Normal Zeds are the most common Zed type. They do not act hostile to other enemies in the stages. Zeds appear in Pit Stop starting from Wave 2, in The Haunting of Nevada House endless waves, and in The Murder Room with Honk Zeds. Zeds also constantly attack survivors and Bandits if they get into their line of sight. Zeds are incredibly drawn to alarms, and if Sanford and Deimos activate them, swarms of zeds will spawn.
Throughout the Residential Sector, zeds are a reoccurring and plentiful enemy that you see constantly. You encounter them in the second room as Sanford and Deimos. Zeds first appear in the Residential Sector in Beat the Streets.