UPDATE: Bethesda has announced that Dishonored will release on PC, PlayStation 3 and Xbox 360 in 2012.

ORIGINAL STORY: Bethesda has announced Dishonored, a new first-person stealth action adventure game.

The developer is Arkane Studios, which was bought by Bethesda parent company ZeniMax in August last year.

Harvey Smith, one of the developers of the first two Deus Ex games, is co-creative director, reveals Game Informer.

Viktor Antonov, who designed Half-Life 2's City 17, is also on board.

"Dishonored is the antithesis of a edge-of-your-seat roller-coaster ride," Game Informer said.

"It's a game about assassination where you don't have to kill anyone. It's a game about infiltration where you can set up traps and slaughter the entire garrison of an aristocrat's mansion rather than sneak in. It's a game about brutal violence where you can slip in and out of a fortified barracks with nobody ever knowing you were there. It's a game about morality and player choice where the world you create is based on your actions, not navigating conversation trees."

Bethesda is yet to announce release platforms or a launch window for the game.