There was a never ending civil war that raged for months that caused one side to experiment in genetic mutations. As the experiments progressed, things got out of hand and destroyed the entire research base. They also had the ability to turn the humans against each other and join the mutant side. Command your base to wipe out the mutant scourge to protect the human race. Build new facilities to create units that will be used to fight the enemy head on. As they get strong, build towers to directly defend your base in case an monsters get through your first line of troops. Fight back all the mutants and keep the human race safe.