Legacy of Kain: Dead Sun was an action-adventure video game developed by Climax Studios for Square Enix Europe, with an accompanying multiplayer component developed separately by Psyonix. Conceived as the sixth entry in the Legacy of Kain series, Dead Sun entered production for Microsoft Windows, PlayStation 3, PlayStation 4, and Xbox 360, but was cancelled in 2012 following three years of work, and initially remained undisclosed to the public. Square Enix Europe and Psyonix salvaged the planned multiplayer mode, which they reconceptualized as Nosgoth, a standalone free-to-play title.