Sin & Punishment: Successor of the Earth (N64)

From the introduction:

In the near future of 2007, mankind’s prosperity has finally backfired on themselves, leading to overpopulation and food shortages on Earth. To combat the crisis, the world nations approved developing a new species of animal to be created for consumption, conducted in Northern Japan, who were the forerunners of technology at that time. Initially a success at first, catastrophe struck when a mutation in the lab specimens had taken effect, infecting the host animal and producing abominations related to their biological makeup.