Protagonist Quill explores a fallen kingdom slowly reclaimed by nature, solving handcrafted, diorama-like environmental puzzles. The courageous mouse wields weapons, including a sword and hammer, for melee attacks to fend off foes. Players can choose the optional “skip combat” accessibility feature for a more relaxing, story-focused experience.
Orchestral music for the game series is composed by Jason Graves, available for purchase through the Polyarc Bandcamp page, with streaming on Apple Music. Moss: Book I features vocals by Malukah on "Home To Me." Moss: Book II featured performers include Kristin Naigus on Irish whistles, flute, and oboe, Reinoud Ford on cello, and Tom Strahl on bouzouki and oud. Album art is by Corinne Scrivens.
A free demo is available through Steam, verified for use with the Steam Deck. The console edition will launch for Xbox Series X|S, PlayStation 5, Nintendo Switch and Switch 2.
From the PlayStation product page:
Embark on an emotional and atmospheric adventure set within the pages of a living storybook, brimming with myth and ancient magic. Moss: The Forgotten Relic unites the beloved and critically-acclaimed Moss: Book I and Moss: Book II into a definitive experience, beautifully enhanced and reimagined for its debut on PlayStation 5.Polyarc Bandcamp - Moss (Original Game Soundtrack) Vinyl / CD / Moss: Book II (Original Game Soundtrack) Vinyl / CD
Apple Music - Moss (Original Game Soundtrack) / Moss: Book II (Original Game Soundtrack)
Quill goes where you go 🐭
— Polyarc Games 🌿 Moss (@PolyarcGames) June 8, 2026
✅ Moss: The Forgotten Relic is OFFICIALLY Steam Deck Verified!! pic.twitter.com/iFcQth3Hh6