Genetic tampering to prepare for the future, the combination of Mammalia and other Animalian Genomes, lead to a project known as Experiment X on Okinawa Island. Following the destruction of the World, the tests continued until eventually, the entire population of the vault consisted of applied subjects with different animalistic and even insectoid features. Following a containment failure, all personnel and employees were placed in cryogenic stasis to await rescue from another facility. Except, there were no other facilities. By the time the world healed over, only one active stasis pod remained. It was time for J4-2K, otherwise known as Jack, to wake up and smell the ashes.