Talk:Shielder/@comment-173.23.150.197-20140910205239

Shielders seem to be enemies that spawn at critical moments that  signifies an increase in difficulty. In "Onslaught", they spawn at about 2 minutes in to destroy the walls because soon boss fight will occur. In "Vaccine" they spawn to the right of the subway on the platform and once you reach street level, hordes are pre-spawned, and even within that level, the lab has more shielders. In "Zombie Pods", they spawn once the storefront is breached and entered by the player. In "Last Stand", right before the boss spawns, a group of shielders spawn.