The gameplay is really, really enjoyable. I was very skeptical on how it would play but it turned out to be very fluid and fun. You've got absolutely gruesome melee combat that doesn't feel like shit ala dead island, guns that actually make enemies recoil realistically when shot, a gore system I'd compare to killing floor 2's, and parkour that actually fits in and feels nice. It feels pretty close to Mirrors Edge in fluidity. The day/night cycle is neat as during the day you look for loot, find airdrops, and do quests. At night you have to sneak around the now huge, fast, and aggressive hordes of infected and their nasty special infected. You can sleep through the night at a safehouse but you lose out on double XP.
If you can get this for $45-50, I recommend it. Its story is sub-par but the gameplay is rock solid. If you pirate it and don't like the start, keep going. Killing zombies and getting around at the start are slow. By the end you're dashing around like you huffed some fresh coke.
Supplemental videos
Night time fun:
Typical sewer stuff:
Katana and nothing personal gore:
![Image](http://i.imgur.com/gZSgjRy.jpg)