nuclear winter

Intro this is the aftermath of a nuclear war which changed the weather completely making it a eternal winter and there's less than 800 people left on Earth and you managed to get into a bunker before the bomb hit you were trapd there with one other person but they went crazy and killed themselves now you're running more on resources and have to travel out into the abyss of winter to survive you choose the characters and people who didn't make it into the bunkers mutated into bug or just pure disgustingness and mutation and they aren't even considered human by most people so watch out for those