From the introduction: As an Aperture employee, you are privileged to work among the best and brightest minds in the world, pushing the envelope of human knowledge further every day, a brave explorer charting unknown territory. However, sometimes the job isn’t all it’s cracked up to be. When Science grows too demanding, when the company’s moral compass starts spinning like a zoetrope, when the years turn to decades and all hope runs out, it drives Aperture’s truest believers to do stupid, vile, greedy, unforgivable things - for themselves, for the company, for Science! What happens when you mix horrendously unethical experiments, reality-bending technology, robots, extra-dimensional invasions and a smattering of desperate, deeply flawed characters?