Indie development studio SMAC Games has released a new Tokyo 42 downloadable content pack titled Smaceshi's Castles.

In Tokyo 42 you are framed for a murder you didn't commit. Players delve into a world of assassins, deadly corporate intrigue and cats as they explore a hand-crafted micro Tokyo and discover its secrets.

The new downloadable content pack Smaceshi's Castles includes a 90-mission challenge arena that features brand-new weapons, bows and shuriken, as well as a host of new stealth, combat, parkour and racing gubbins.

The studio has also released the new multiplayer map Bishops Itchington 42, which is said to be inspired by a village in the Stratford-upon-Avon district of Warwickshire, England.

Along with the release of new content, the game has also received a free update that is said to feature significant changes to bullets and combat, new difficulty modes, and user interface changes.

Tokyo 42: Smaceshi's Castles is now available for PC. The new content and update will also be released for Xbox One and PlayStation 4 at a later date.