Today World War Z: Aftermath released a free update that adds a new enemy, the Booster zombie, which enhances all the enemies around it, daily challenges and lore documents. You can check out the trailer below.
World War Z: Aftermath - Official Booster Zombie Update Trailer
Video description: The new World War Z: Aftermath free update brings a World War Z Aftermath Booster zombie type and daily challenges to the co-op zombie shooter. Check out the World War Z Aftermath trailer for a look at what to expect with the update, available now. Armed with concentrated biosamples, the new World War Z Booster zombie type enhances all zombies around it, making them even deadlier.