This new trailer is a nighttime gameplay walkthrough for Dying Light, Techland's zombie game that's expected for Windows and consoles next year. The day/night cycle will be integral to gameplay, and word is the clip "is showcasing the darker side of the game's revolutionary day-and-night-cycle mechanic and gives a glimpse into different strategies that players will adopt depending on the time of day in order to survive." Here's a bit more from the description: "Slow, apathetic, and easily visible, the infected are not much of a threat in daylight. But this relatively safe state of affairs is turned upside down as the sun sets. At night, it is you who is at a disadvantage. Without daylight, the senses of the infected become more acute while their thirst for human flesh skyrockets. They run, jump, and climb, so there is really no place where you are safe anymore."