I Can't Be the Savior

We unearthed a strange substance of unknown origin in Antarctica. Disaster struck. Creatures in the world break free from the shackles of evolution and evolve wildly and uncontrollably. The bases on which humans rely for survival have been brutally destroyed, an overwhelming wave of mutant beasts has swept across the world, and civilization is on the verge of collapse. Should you indulge in the power of aberration, or shoulder the burden of salvation? Can you, chosen by fate, become the world's only savior?