Good things don't happen at night
As I wrote about at E3, there's a lot that you can do in Techland's Dying Light. First and foremost, you can run, jump, and grapple your way across terrain at a breakneck speed. You can take a break from traversal and use your arsenal of weapons to hunt the endless shambling zombies. And, when the sun goes down, you can hide and cry in a corner, because you want no part of what the nighttime brings.