In this E3 2014 interview, we find Chris Davis chatting it up with one of Techland's lead game designers on the upcoming Feburary 2015 title Dying Light. Throughout the interview we learn more about a few of the abilities and mechanics of the game, including the overall nature and purpose of the abilities given to the players. They also discuss the diverse selection of weapons that are available in game, and how important they could potentially be to the experience. But the most important detail would undoubtedly be the inclusion of an underwater swimming element in the world, because what would a game be without underwater swimming anyway?
For other cool E3 2014 interviews, I suggest checking out the 4Player Network youtube channel, where you'll find games like The Witcher 3, Batman Arkham Knight, and Evolve being discussed with the people who made them.