Bethesda has released a trailer for their first piece of DLC for Dishonored titled Dunwall City Trials. The DLC includes 10 unique challenges that will test your skills as the ultimate assassin. It also includes leaderboards and new trophies/achievements. The DLC is set to release on December 4 for the PC, Playstation 3 and Xbox 360 and will run you $4.99 (or 400 Microsoft points). Check out the trailer below.