Bethesda debuted a 30 second TV advert on Sunday night. For those that weren't watching Face Off on the SyFy channel (honestly, what are you doing with your life?) it has also been released online.
The short teaser shows Corvo, the game's steampunk styled, magic wielding assassin murdering folk to the tune of 'What shall we do with the Drunken Sailor', which is sung by a little girl. Points for creepiness Bethesda.