Jaws is an achievement that can only be accomplished with the Necroa Virus.

How to get this achievement?

To get this achievement you need to evolve the symptom delirium and then hyperosmia further down after you have made zombies, unlocking the following message: "<Blood in the air> a heightened sense of smell combined with paranoia causes zombies to relentlessly search in an area where they smell fresh blood - increasing their severity."

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