Eraser Ark. Darkest end

The end of the world is nothing when you have a bottle of booze and know you did all you could to try and save it. When the only option left is to dictate your life's experience so that maybe the next incarnation of civilization might do better, you've got to do it.   Monsters, demons, or multidimensional beings, whatever or whoever made them, I'll be sure they will be stopped, eventually.