Campaign: After being summoned to an underground prison to transport a dangerous criminal, you quickly realize that something has gone wrong. Sirens begin to blare and monstrous creatures begin to emerge and attack everyone in the facility. As the lock down sequence initiates, you suddenly find yourself trapped inside and being pursued by mutated abominations. Now you must fight to survive and journey through the highly secured facility to find another way out, along the way, discovering the source of the incident. Horde Mode: See how long you can last in horde mode! Rack up points by getting kills and use those points to unlock better weapons, activate traps, or access new areas of the map. Play both the campaign and horde mode solo, or pick up arms and play co-op with your friends!