Funded through crowdfunding website Kickstarter in 2012, the game launched in September 2013 in early access, and was fully released in August 2017.

[9] Castle Story was made publicly available as a paid early access game through the digital distribution platform Steam on 23 September 2013.

[11] The game was fully released on 17 August 2017 for Linux, macOS and Microsoft Windows, with Sauropod shifting to bugfixes and developing post-launch content.

[3] A Kickstarter crowdfunding campaign seeking $60,000 did not manage to get funded halfway and Sauropod failed to find a publisher to finance the game.

[3] The idea of using early access was considered but ultimately rejected as the studio did not plan to support the game greatly post-launch.