Zombiess are the undead adversaries of Undead Assault Reborn, and form the bulk of the enemy that the players will be facing. Zombies are separated into three Tiers, which distinguish the ways in which they spawn and in what ways they put pressure on the players over the course of the game.
Tier 3 and Tier 2 Zombies
Tier 3 and Tier 2 Zombies have low to moderate health and spawn persistently throughout the game. They may have active abilities, passive abilities, or no abilities at all relative to their frequency of appearance. In Outbreak mode, the majority of enemies that spawn will be from the lower-level Zombies in this tier.
Tier 1 Zombies tend to spawn one at a time in response to mission events. The few that spawn persistently can spawn in waves of up to 3 at a time. Most Tier 1 Zombies have passive or active abilities and have high to very high health. Higher-level Tier 1 Zombies spawn only as bosses in response to specific mission events. All of these Zombies are highly dangerous and combine their very high survivability with their powerful abilities to overpower the players in a variety of ways. Tier 1 Zombies are recognizable in that they are pinged by the Heartbeat Sensor ability of the Cavalry Scout. Almost all Tier 1 zombies are Detectors (Spitters are not).