Fear Equation

The world is covered in fog. Most who enter the fog disappear, and those who survive say it brings their nightmares to life. No-one knows where it came from, but they all have ideas. Some say it's an experiment gone wrong, others believe it's divine judgement. And you? All you know is that the Sun is rumoured to shine just over the horizon. You are The Engineer. You have designed the perfect system: a train, sealed off from the fog, ready to rescue survivors and take them to salvation. If only they'd listen...