Stealth

While direct fighting is always an option (a very hard option), the stealth system is heavily based on the amazing stealth play.

Using shadows to conceal yourself, you're able to lure away enemies with distractions (sound and vision detection), or simply sneaking around an unaware enemy. Of course, a bit of stealth can also come in handy for getting the drop on an enemy (for the combat-oriented), letting you start the fight with a little advantage.