Deus Ex: Human Revolution, Dishonored, Bethesda’s upcoming spy game, will notice if you prefer killing to non-lethal methods, and vice versa, using a new "Chaos" game engine, in which even the look of the game will change depending upon your actions.
According to developer Arkane's Raphael Colantonio, "Killing a guard is chaotic, but not very chaotic. Killing a maid, this creates more chaos. Ringing an alarm creates chaos. After some threshold we have consequences."
“Some of them are more like atmospheric effects like there are more rats, for example," descrubed Colantino, "Some of them have gameplay consequences like there are more guards patrolling the area. And some of them are story consequences like this ally may now betray you or instead be very excited. It’s all linked to different effects all the way down to the endings.”
Dishonored will be released in 2012 on the PC, Xbox 360 and PlayStation 3.