In February 2016, Playdek announced that development had been stopped for lack of resources.[3][4] In early 2017, Playdek announced that Little Orbit would continue the game's development in their place, with Little Orbit buying all of the rights and assets.[5][6][7]Unsung Story was released in early access for Windows on December 17, 2020, ports meant for macOS, Linux, iOS, Android, Nintendo Switch, PlayStation 4, and Xbox One at full release.[8]
In 2021, Matthew Scott of Little Orbit shared to Kickstarter that Matsuno not been involved with day-to-day development of the game since 2018, and felt uncomfortable with his name being used in connection with the game. As a result, Little Orbit stopped using his name in the game's marketing.[9] In 2024, it was revealed that Matsuno's direct involvement with the project ended in 2016, after the initial stages of development.[10]