vivor or a Gamma Prime- each side having completely unique game mechanics and vastly different goals. Each Survivor has their own exclusive weapon sets, skills, and gadgets. Their unified goal: the preservation of humanity from the throes of the Gamma Strain pandemic. They must rescue and evacuate civilians, ensuring that the infection does not spread. As with any virus, it's main prerogative is to evolve and disseminate. The Gamma Primes, victims mutated by the Gamma Strain, are the perfect catalyst for this task. As a Gamma Prime, you start the game embodying an infected rat. Scurrying around, spreading terror and infection. The more corpses and civilians you infect, the greater your respawn pool becomes. Choose when you want to take the next evolutionary step, and become a zombie, and then fully evolve into a Gamma Prime; using these stages to your advantage.