Still on the fence about the upcoming Thief game? Then check out this extensive gameplay trailer which does a great job of showing how you'll be able to play the game in any style you want. Play as a ghost and remain undetected throughout your mission, try to play the game without killing a single person (betting there's a Trophy for that) or just swagger around firing lethal arrows and stabbing people in the neck -probably making life quite difficult for yourself in the process.
Coming from the team behind Deus Ex: Human Revolution, we'd expect open approaches to missions to make up a large part of the game's DNA and are enormously relieved to finally see some solid evidence of this. The footage brings to mind a hybrid of Deus Ex, Far Cry 3 and Dishonored, which might just the best thing to happen to stealth gaming since Hideo Kojima looked at a PS1.