Dark Queen (Sonic The Hedgehog)

is a 2009 platform game developed by Sonic Team and published by Sega for the Wii. A spin-off of the Sonic the Hedgehog series, it is the first and only Sonic video game in the franchise to not include the franchise's main antagonist, Dr. Eggman in any way, as well as the second and final entry in the Sonic Storybook sub-series following Sonic and the Secret Rings (2007), and involves Sonic being transported to the story of King Arthur by wizard Merlina, under the pretense that they are attempting to stop a corrupted Arthur (the Black Knight); however, it is later revealed that there was no corruption and they must stop Merlina's misguided attempt to prevent the legend's fate from occurring. Gameplay involves controlling Sonic around with the Wii Remote's motion-sensing functionality, particularly swinging around the sword to attack enemies and to move forward.

Development on Sonic and the Black Knight began in 2007, shortly after the completion of Secret Rings and involved the designers of both Sonic Adventure 2 (2001) and Sonic Heroes (2003), led by producer Tetsu Katano. Black Knight was conceived as a way to attract new audiences to both the series and the legends of Knights of the Round Table among console users, with Sega holding focus groups to choose which characters would appear in the game. Visually, the game was stylized after Sonic Unleashed (2008) and uses the PhysX engine. Black Knight was revealed in July 2008, and released in March 2009 in all regions. Various composers from the series, particularly Jun Senoue, Richard Jacques and Howard Drossin returned to write the soundtrack.

Sonic and the Black Knight received mixed reviews. Reviewers praised the graphics, presentation, story, and large amounts of bonus content, but criticized the controls, swordplay mechanics, and multiplayer aspects. Black Knight would be among the final games in the series to feature the English voice cast from the Sonic X anime, most of whom would be replaced starting with Sonic Free Riders (2010).

Sonic and the Black Knight is an action-adventure platformer, with elements of hack and slash.