The Witch Doctor is a new character reminiscent of the Diablo II Necromancer
The Barbarians will have a variety of revamped skills at their disposal based on the use of their incredible physical prowess.
1-on-1 dueling system coming into play.

At night, the world undergoes a deadly transformation: the hunter becomes the hunted as the infected grow more aggressive and numerous, and something far more sinister awakens to stalk its prey
Free Running Movement – Whether tracking prey or escaping predators, Dying Light lets players swiftly navigate the world by seamlessly leaping between buildings, grappling up walls and pouncing on unsuspecting enemies
Dying Light is set in a vast open world, delivering expansive and varied environments, a wide variety of enemy classes and a hopeless tale of survival where resources are scarce and the infected are not the only threat