Grey Chemical Bottles are, as the name states, a chemical stored in glass bottles that the survivors can use to defend themselves against the hordes of undead and other creatures. These bottles are filled with an explosive agent that is unleashed on contact when the glass container shatters and inflicts massive damage (600HP) to the targeted enemy. Also, it will inflict the same damage to the nearby enemies due its blast radius. It's highly recommended to use this against a group of enemies.
- They are always found in quantities of 3.
- In Outbreak, after their use, a player must open the item screen and equip one, but on its expansion the item will be auto-equipped.
- Hunters will die from a single hit from this "weapon".
- They will only cause half of their damage to the G-mutated boss in The Hive scenario.