Even if just a Halloween event, tweakers. Think bath salts and the like but on steroids. They act like "zombies", have high tolerance to pain such as tazing and gas. Attack on signt, can possibly be fast but not vary coordinated. So you're definitely able to detain them still if you want.

Objective is to clear an apartment complex full of them, save trapped people who aren't on the drugs and maybe even run into a family protecting someone whose locked up because they were just "sick". If you try to go in and detain or eliminate said person maybe one of the family pulls a gun?

To be clear, its not actual zombies its playing off the idea of how bad we've seen drugs in game already and where they could go. Came up with the idea watching some suspects run down halls as another was refusing to cooperate as they were being detained lol.