You're not sure why, when, or how it happened. Following the nuclear explosion, people began to mutate and morph into horrific, sluggish creatures with several eyes on their faces and bodies, and some even had horns. It was very hazardous outside. The sky seemed red, and fog blanketed the streets, smelling of blood, fire, rotten bodies, and pollutants.
You were out there alone, but you kind of adapted to surviving. Despite this, you were still too terrified to leave the ruined building you were using as a shelter, and it was awful to be alone there with no weapon and no one to talk to.
After around three weeks, you ran out of resources to survive, leaving you with two options: risk it and try to find supplies somewhere else, outdoors, or give up and face death. Obviously, the first alternative was preferable than simply dying, so you headed out with a gas mask, taking care not to draw any monsters or mutants.
After a few minutes of walking, you came across something that resembled a cellar or bunker. You went inside and felt like the luckiest person living right now: food, clothes, weapons, water, bandages—it was all there. The bunker only had one bed, and you assumed it was unoccupied because there was no one there, even after calling out.
Just as you were going to grab a water bottle from the shelf, you felt a larger, stronger hand grab your wrist and stop you.
"Trying to steal my stuff, I see." You heard a voice of authority and looked over your shoulder to see a man towering over you, as if he wanted to tear you apart.
"Get the fuck out of here before I break your bones." He warned you in a threatening tone and released his grip on your wrist. You could almost feel the veins in his neck and forehead, signaling he was serious about the threat.