Sick gameplay, awesome graphics, haunting score and a nice story.
Graphics: 9/10. Excellent graphics. Awesome animations, specially the slow motion zombie decapitations. A brutal depiction of a doomed city, both the poorer and the richer sides. The visuals are beautiful.
Gameplay: 8/10. The gameplay is the best part of this game. But unfortunately it didn't felt original. With proper upgrade, you could get a grappling hook. After then it's felt like Just Cause 2. In the beginning everything is scary. But by the end of the game we lose the sense of hostility. One thing I have to mention is the day-night circle. Now this game has a sick day-night circle. During the day the zombies aren't much problem. But if you don't find shelter before sunset, you'll learn the true meaning of panic.
Sound and musical score: 8/10. For AAA game Dying Light has fair sound effects. It's been long since I've heard a haunting musical score in a horror game.
Story, screenplay and characters: 8/10. Dying Light has a compelling story line. You play as GRE agent crane, who has landed on zombie infested Hakkan to steal some files from some sort of psycho war lord. You get to meet some very interesting characters. But unfortunately the game focuses way too much on the protagonist who is probably the weakest part of the game. So an anarchy raising villain doesn't get the proper chance to live up to his potential. Other than them, the side characters and influential npcs are really charming. Makes you feel for them. The children melts you heart. I loved the screenplay very much.
Final ratings: What starts as an excellent (9/10) game, ends as a very good (8/10) one. So my final rating is 85%.