Deadzones

Deadzones are large, contaminated areas positioned by a Deadzone Node where, unless a player is wearing a Gasmask with non-depleted filters (and possibly biohazard clothes), the player will quickly lose immunity until they start losing their health and, eventually, die. Deadzones are usually the most dangerous areas on any map, and so are often where the most rare, end-game items are found.

Zombies that spawn in Deadzones spawn as Radioactive Zombies, which causes them to emit a green effect and explode with green biohazardous material when killed, which will harm the player.