As a demonstration of the multi-solution system in Deus Ex: Human Revolution, Eidos Montreal put together a video of the first mission in the game played three different ways. Before Adam Jensen can recover the Typhoon weapon system he needs to break into a factory.
The first run is straight combat where Adam uses lethal takedowns and shoots everything in his path to the front door. The second play style attempts to avoid combat as much as possible by hiding behind cover points. The third route avoids the main entrance all together.
I tried all of these paths during my hands on with Deus Ex: Human Revolution. You can read more about that and the other choices players get to make in our impressions of the game.
Deus Ex: Human Revolution will be available on PC, PlayStation 3, and Xbox 360 on August 23 in North America.