[4] A sequel, Moss: Book II, was announced by Polyarc during Sony's State of Play in 2021, and was released on March 31, 2022.

[8] Quill communicates with the player through the use of American Sign Language (ASL) for puzzle hints and emotional responses.

[11] On May 21, 2019, a free DLC with additional environments, challenges, storytelling, new puzzles, combat, and weaponry was released.

[11][7] In a 2017 article, Mike Fahey of Kotaku noted the positive response to Quill's design and use of sign language.

[21] On August 3, 2018, video game record label Materia Collective released the soundtrack digitally, as well as on compact disc and vinyl.