Bethesda has just announced some details for their Dishonored Dunwall City Trials, which is being released this December for £3.99 / €4.99 / AUD$8.45 (or 400 Microsoft Points) and will include 10 new challenge maps.

The Dishonored Dunwall City Trials aims to further test and track players combat, stealth and mobility skills. The trials will include an arena battle against waves of enemy AI, a gravity-defying run of drop assassinations, and a race against the clock. Dishonored Dunwall City Trials comes with a whole new set of achievements and trophies as well as a global online leaderboard.

A second and third add-on for Dishonored will be coming in 2013 and will each feature story-driven campaigns.

Daud, the leader of a group of supernatural assassins known as ‘The Whalers’, will be the focus of the second add-on pack, scheduled for release in early Spring 2013. Make your way through new Dunwall locales and discover Daud’s own set of weapons, powers and gadgets in this story-driven campaign. How you play and the choices you make will impact the final outcome…

Additional story details on the third add-on pack will be revealed closer to its launch next year.