Spencer Hayes and I got some quality time with Techland's Dying Light and we both came away pretty surprised from the experience. The game features a day and night cycle, and the day time stuff we played was pretty average. We knew what to expect, especially after playing games like Dead Island, another open world zombie game from Techland.
But then the night time stuff came up and holy crap the game gets super intense. More importantly, Dying Light becomes way more fun. The zombies transform in runner style zombies like the ones from Left 4 Dead and they become relentless in chasing you down. My heart was seriously racing as I tried to escape the horde, so they've certainly nailed down the horror aspect.