Watch Dogs looks to be a mix of some of Ubisoft's more popular series, including Splinter Cell. It's taking that piece of its identity seriously, letting you make your way through the vast majority of the game without racking up a body count.
"About 95 percent of missions you can completely stealth through, or flee or chase without having to shoot," senior director Dominic Guay told Polygon. "So it's really player choice-driven. There are a very few, very limited amount of missions that will force you to kill people."
As an example, a demo showed Aiden relying on a gun-for-hire to help clear an area, using his hacking skills to clear a way. When it came time for the "boss," he was merely shot in the thigh. Instead of killing him, the player hacked loads of his personal information and taunted him with it.
That still means about 5% of missions require you to kill, and arguably relying on an NPC to do the shooting for you isn't a true no-kill condition anyway. But it does show some flexibility in how you approach a situation, which seems like a must for a game all about controlling the environment.