Level 1. Catch Fire
It begins with a virus.
Then, after the apocalypse, you wake up in Boston.
Leafless tree branches, pockmarked either with the white of residual radiation or mere silhouetted skeletons against a sky that is always the wrong color. Fog running along war-created riverbeds to hide mutated dogs and two-headed bear-wolves and zombies that run too fast. In the towns you happen across, people trying to kill you fill the alleyways between the brick apartment buildings. Military convoys rumble down concrete streets. Armed guards, dressed in the all-black of a steroidal SWAT team or the rags of a band of marauders, swarm around concrete barricades. Storefronts are hollowed out, but occasional supplies will glow when you near them: scissors, gauze, ammunition for your .45; tin cans, the irradiated hide of an unnatural animal, ammo for your customized nine millimeter.