Damn, I haven't reviewed this yet ?

Dying Light.
It is truly a great and flawless game, I personally love every single aspect of it, be it gameplay, story, graphics, visuals, mechanics and etc. What I especially like is that, at the beginning it's much more of a survival so you'll have to avoid zombies as much as you can, as you level up and progress towards story, you'll unlock many various items/skills/gadgets that it may even turn the game into piece of cake on normal difficulty, of course if you invest some time and enjoy the game instead of rushing quests. You can also change difficulty anytime.

The Gameplay.
Gameplay heavily adapts on your skills, weapons and story progression. It's really interesting how you level up, unlock game changing skills and slowly develop your character by finding better weapons, upgrading and crafting with even more deadly upgrades.

Dying Light sometimes reminds me of Skyrim, and all that huge amount of fun I had from it. If you've played and liked Skyrim, you're most likely to enjoy the Dying Light.

Skill-Trees.
You have total of 5 skill trees. From the beginning you'll have three, Survivor, which you gain by completing quests, saving survivors, delivering air drop packages and etc. Agility which you gain by running, jumping, climbing and harder the obstance more experience you earn. And power, you gain power experience by killing zombies with any weapons. Fourth skill tree would be Legend which I've explained below, fifth skill tree is a Driver which is only accessible in The Following DLC.

The Story.
Dying Light has a decent and serious plot. It is a very interesting, memorable and enjoyable, there might be some plot twists and sad moments. The ending is very exciting and satisfying.

But be warned, story isn't the best side of Dying Light, it's gameplay.

Saving/Checkpoint System.
Saving system is simple but there's no manual saving. Though almost on everything you do, auto save is triggered, as well upon quitting. I've never lost anything due to saving. Big missions have their own checkpoints. Upon dying or reloading save, you'll spawn in area depending on which quest you have selected or in safe zone.

Weapons.
There's huge weapons choice. Axes, machetes, knives, swords, scythes, katana, great axes/swords and etc. Throwable weapons such as shuriken, want to be ninja? well you can. As well as ranged weapons, pistols, revolvers, SMGs, assault rifles, shotguns, bows and crossbows. Each kind of weapons have quality tiers. Melee weapons have durability and repairs, that means you cannot keep repairing single melee weapon infinitely, it'll eventually downgrade and break.

What I love even more about Dying Light.
It is the bows and crossbows, and their awesome and smooth mechanics. Also the fact that you can pickup and reuse the arrows/bolts which is really fun. You'll never run out of arrows this way, unless you're forced to flee from the area being unable to retrieve arrows.

Bows and Crossbows never downgrade and since you can pickup arrows/bolts, you can always use them if you run out of firearm ammo or your melee weapon breaks. You can also craft arrows, even elemental arrows, also buy them from merchants.

Perfectly Polished.
Over 1,000+ hours so far, and not even a single game breaking bug, of course I've encountered some minor glitches but they weren't really worth much of a trouble, in fact I can't even remember any of it now. Actually it was fun.

Legendary Levels.
Legend skill tree is a great addition to the Dying Light, it came with Enhanced Edition. Once you max out one of your Survivor/Agility/Power skill trees, you'll unlock a Legend skill tree, all the experience gained from that skill-tree then goes towards the Legend, which adds 250 extra levels and a great opportunity to invest some more time in Harran. Legend skills are greatly useful in Nightmare difficulty.

Huge Content.
And I mean it, I've started The Following DLC after 700+ hours, beaten the base game multiple times, still going for more.

Great Developer.
They've upgraded the game to the Enhanced Edition totally for free. And if you purchase the game now you also get ALL the DLC to date, except Harran Ranger, Gun Psycho and Volatile Hunter bundles, though these 3 are very cheap and not really necessary to enjoy the game. You also get everything that's included in season pass.