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Spiral Knights is a massively multiplayer online role-playing game developed by Three Rings Design and published by Sega. The free-to-play, Java-based game was released to advance testers on November 12, 2009 and to the general public on April 4, 2011. The game was released through the Steam software distribution system on June 14 of that year, and through Kongregate on September 22.
In the game, the player controls a knight of the Spiral Knights order, which has crash-landed on the mysterious planet Cradle. Knights collectively explore the Clockworks, the mechanized, constantly reorgan...