Deus Ex: Human Revolution - Playing the Demo Twice

Siliconera has an article titled Exploring Choice in Deus Ex: Human Revolution by Playing the Demo Twice. An intro quote to avoid spoilers:

Not counting the pre-augmentation opening, which we covered before, I got to play through the beginning of Deus Ex: Human Revolution twice. (Actually, two and a half times.) Since player choice is at the core of the Deus Ex multiple runs gave me an opportunity to experiment and see how my decisions affected the game. We’re going to dive into this in detail, but spoilers will be covered with giant black bars. Highlight the text for "what ifs" and to know more about the game.