The debut trailer of Dishonored
In all this, to fill the role of "good" is the title character, complete with a mask, climbs and jumps between the roofs to reach his goal, possibly without being noticed by the guards were posted around the perimeter.
From what you can see then, at least from these early stages in CG is a concept on paper very similar to Assassin's Creed where the player must perform climbing, jumps and stunts with killings areas trying to keep a low profile. Among the new features, and instead refer to other games, there is a sort of bullet time where time is slowed down and you can take advantage of the situation to our advantage by selecting weapons more quickly or performing other actions. With regard to the technology used, it seems there is a mixture of traditional weapons and devices of science fiction games can pulverize at a stroke the enemy.
We leave you to the movie whose motto is "revenge solves everything".