Recs.
Updated
Dishonored is a first-person stealth game where you can combine magical abilities and unique tools in interesting ways to tackle large, nonlinear levels.
SpecsUpdate
Pros
Pro Non-lethal options aren't always better
One weakness of most stealth games is that it's almost always better to play nonlethally. In Dishonored, choosing the nonlethal option on an assassination target is often a fate worse than death. For instance, one woman can be delivered to her secret stalker, the overseer of the anti-magic church can be branded as a heretic and punished by the church, and a pair of brothers can be sent to slave in the mines they once owned.
Pro The world (and difficulty) changes based on your actions
Depending on player action, the world can change in drastic ways. A violent player will find that disease-carrying rats will multiply in number depending on the number of people killed, while a pacifist player who eliminates enemies with nonlethal options may will find the world easier to explore.