In Lightning Returns: Final Fantasy XIII, you can bring entire races of the games enemies to extinction, Square Enix have revealed. There are limited numbers of each monster species in the games world of Nova Chrysalia, and when Lightning kills all of the monsters in a species, it becomes extinct.
Well, that is, after one last boss fight. The last remaining survivor of the species is called the “Last One”. This is a far stronger monster than the rest of its species, and defeating it causes the species to go extinct. (Square note, however, that some monster species cannot be eradicated completely.)
Lightning Returns: Final Fantasy XIII will be released in February 2014 for the Xbox 360 and PlayStation 3 in North America and Europe. Japan will get the game on November 21st, 2013.