You enter the digital world of Darwinia created by Dr. Sepulveda. Darwinia is inhabited by sentient and evolving lifeforms called Darwinians. These independent lifeforms have set about their world, which exists inside a super computer, creating their own beliefs and way of life. The only problem is that like any computer, there are eventually viruses that creep in, leading up to a great war with the Virii.