When your planet gets destroyed but the powers that be recognize your species as worthy of a continued existence what happens? You get transported to a new planet, with other relocated species. What happens when the new Dimension you are in has different basic laws of physics and power? You get an advantage while being relocated. That advantage is a gamelike system of levels and abilities. Now the last humans in existence have to survive and find eachother on this alien world where they aren't alone and they are the fresh meat.