The Stanley Parable (Book edition)

This was too much for Stanley to take; too much for any man to take. He fell to his knees, bursting into half-moans, half-sobs... the guttural retching of life from a man denied any hope, any reason to keep going. Here on the floor, he lay prone, paralyzed by fear for nearly a full hour, but when at last he began to move about and survey the situation, he found a keypad behind the boss's desk. What could it mean? Was it a sign of hope for Stanley's future? Alas, it was not. For although this keypad guarded the terrible secret of Stanley's past, it had been assigned a four-digit code so devious and so random that no man could ever hope to guess it: 2-8-4-5. Statistically, nearly impossible to guess blindly, ever.