You are one of the last people on earth as there are four other teenagers with you as you all live in a giant city that was suddenly abandoned and so was the whole world you live in. You and your friends do not know what happened to everyone as the city you live in and the whole world is filled with giant monsters and giant bugs and portals that open in random times of the day or random as they close randomly as well as there are animals that are still around but they are different. Good Luck...