Bethesda have announced on their blog the release of the Void Walker's Arsenal for Dishonored. The Arsenal add-on pack will give players access to four content packs that were only previously available if one pre-ordered the main game. The Void Walker's Arsenal includes the Shadow Rat pack, the Arcane Assassin pack, the Acrobatic Killer pack as well as the Backstreet Butcher pack. These packs offer "unique character bonuses, additional bone charm slots, unhidden books and bonus coins that will aid you in your pursuit of revenge". All of these can be used "to enhance your playthrough of Corvo's main campaign in the original game".

The Void Walker's Arsenal will be available on Steam, Xbox Live and the PlayStation Store. You can get your grubby little mitts on it for as little as $3.99 or 320 Microsoft Points on 14th May. The content pack will be available on the European version of the PS3 store a day later.

You can read up on what each pack in the add-on includes at the blog post here.