In late June 2013, Legacy of Kain fan Mama Robotnik posted evidence at NeoGAF, from sources at Climax Studios, that Nosgoth had originated as a primarily single-player, story-based game, named Legacy of Kain: Dead Sun. The project had allegedly been under development between 2009 and 2012 by Climax Studios with supervision from Crystal Dynamics, and was intended as a PlayStation 4 launch title. Its multiplayer mode, developed by Psyonix Games, reportedly became Nosgoth after the single-player component of the game was canceled by Square Enix in 2012, who projected that it would fail to meet sales expectations. Kelion responded by confirming that Dead Sun existed and that Nosgoth was intended to be its multiplayer companion game, but said Nosgoth is a separate project which has "grown in size and scope since its initial conception", featuring "different mechanics, characters, levels and gameplay". He rejected the idea that it is "the multiplayer component of Dead Sun pulled out and fleshed out".
According to Kelion, Nosgoth is not a reboot, a mobile game, an open world game, a massively multiplayer online role-playing game (MMORPG), or a real-time strategy game, nor is it "best described as a MOBA game" (multiplayer online battle arena).] It derives influences from the second game in the series, Legacy of Kain: Soul Reaver, and is played from a third-person viewpoint. It will be available on Microsoft Windows as a download-only title