GameInformer.com now has some of the details from their new print issue on Dishonored, a stealthy first-person action/adventure game in development at Arkane Studio. They offer a screenshot and describe the pedigrees of the game's designers. Here's a bit from their summary on the game:

How are they going to do that?
Dishonored has several major elements that combine to create its unique gameplay: mobility, powers & gadgets, environment, and AI. The trick is that a single power doesn’t just do damage or heal you. You can combine them organically to create interesting effects. Stop time and knock a bunch of stuff off a table in one direction then book it in another, so the guards search for you in the wrong place. Summon a swarm of rats to attack one guard, but possess one of the rats and escape in the chaos. Every problem has as many solutions as you want it to.

What’s the catch?
It’s an assassination game that reacts to how violent you are. An unusual “chaos” system tracks how much collateral damage you cause, and the game world changes as a result of your actions. Unlike a light/dark side meter, though, it’s a behind-the-scenes element that affects story decisions without punishing the player or pushing them to play one way or another.