The last survivors

Years into the future there was a catastrophic accident, the world was taken over by anecite a artificial oxygen as there was too much pollution and the natural oxygen supplies where dwindling. The plan backfired and anecite became deadly once mixed with the natural occurring oxygen and wiped out nearly the whole population.
James, a 24 year old engineer survived the accident and now will fight for survival in order to find other survivors in the broken infected world we call earth ...