"You've probably guessed already. This here is a mutant. Its parents might've been normal humans like us, but it underwent heavy mutations in its mother's womb. From what I heard, it chewed its way through its mother's guts and belly, then clawed its way out," Mad Dog began to explain. "It was captured shortly after it was born, and we've raised it and trained it like a dog ever since. Critter's actually a perfect watchdog for our base!"