About this game

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About the Game

“By this rocket, we return them to the cosmos.“

Travel across a world of ice and snow, through burned down ruins and treacherous peaks, to launch a rocket that will reach the stars.

“Once we fire the rocket, will these ghosts finally leave me?” Asked the man.
“Of course. Our goal, after all, is to return them to the cosmos” The witch replied.

Throughout the game, you will play as two survivors of an apocalyptic plague. Help them achieve the unimaginable of building a rocket, so they can return the deceased to their cosmic homeland through the ancient tradition of space burials.

▼ story

An emotionally-driven and heartwarming adventure written by IMGA nominated writer of OPUS: The Day We Found Earth. Explore an atmospheric world full of mysteries and rich narration.

▼ Explore

Travel through a post-apocalyptic winter filled with ruins and remnants of a once prosperous land. Explore the unknown for antiques and artifacts, and find out about their past.

▼ Build

Prepare for countdown by gathering the materials needed to build a rocket, and craft tools that will help you reach greater distances.

▼ Art

Over 100 items to find and inspect, each beautifully drawn with a story to match, including rocket material backed by careful research on rocket science.

▼ Music

Over 30 beautiful atmospheric soundscapes designed to immerse you in the snowy wilderness. Composed and recorded by indiePlay nominated composer Triodust.



Rocket of Whispers is a single-player adventure where players explore a vast snowy wasteland for rocket materials. As you dig through ruins and craft equipment to travel further, the story behind the demise of their world will slowly unfold through the artifacts you find.

Latest news

• Announcements·6 Jan 2023Official

  New OPUS game "OPUS: Prism Peak" teaser revealed!

  https://cdn.cloudflare.steamstatic.com/steamcommunity/public/images/clans/33066045/a0bdfba395768fef3fc57ba53208176a1f6d141b.png OPUS: Echo of Starsong followup title OPUS: Prism Peak is a narrative adventure where your choices lead to divergent endings. Play as a photographer lost in an ethereal realm, and unveil its mysteries with your camera to find a way home. https://cdn.cloudflare.steamstatic.com/steamcommunity/public/images/clans/33066045/fedcaf5c9e7c4b1163358a2d418962c127ca32ab.jpg "Capture the moment, then learn to let go." Check out the shiny new teaser and remember to WISHLIST + FOLLOW! 👇 https://store.steampowered.com/app/1947910/Project_MOUNTAIN/ We hope this announcement kicks off your new year with something heartwarming to look forward to!
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• Announcements·12 Jan 2022Official

  Official Artbook + Bonus World Map!

  This curated companion piece for OPUS: Rocket of Whispers includes 30+ pages of gorgeous character art, maps, and environments, along with previously unseen concepts from early development that are revealed for the first time in this beautiful collection! Exclusive Bonus: Greater Hetmis Region Map An intricate map that unveils the world of OPUS: Rocket of Whispers, lovingly rendered by SIGONO's art team. Includes locations the story took place in displayed in full detail, and many unseen corners that were unreachable within the game. Revisit the world of John and Fei for an intimate look at the development of OPUS: Rocket of Whispers! https://store.steampowered.com/app/742250/OPUS/ {STEAM_CLAN_IMAGE}/31699457/32191a3c5db6ca8576c7c3a12e1824789215ed8e.png {STEAM_CLAN_IMAGE}/31699457/ca618d6a4ca19e41e8d9c52f5a57c7a37e0a2beb.png {STEAM_CLAN_IMAGE}/31699457/4bdd440f9e361dbbff86457e2cf9ebee4bb97f4e.png *The artbook will initially be released in Traditional Chinese only. A separate English version will be released promptly after for everyone who owns the artbook.
  Read full article on Community Announcements (Sigono_games)

• Announcements·6 Nov 2021Official

  Official Artbook + Bonus World Map!

  This curated companion piece for OPUS: Rocket of Whispers includes 30+ pages of gorgeous character art, maps, and environments, along with previously unseen concepts from early development that are revealed for the first time in this beautiful collection! Exclusive Bonus: Greater Hetmis Region Map An intricate map that unveils the world of OPUS: Rocket of Whispers, lovingly rendered by SIGONO's art team. Includes locations the story took place in displayed in full detail, and many unseen corners that were unreachable within the game. Revisit the world of John and Fei for an intimate look at the development of OPUS: Rocket of Whispers! https://store.steampowered.com/app/742250/OPUS/ {STEAM_CLAN_IMAGE}/31699457/32191a3c5db6ca8576c7c3a12e1824789215ed8e.png {STEAM_CLAN_IMAGE}/31699457/ca618d6a4ca19e41e8d9c52f5a57c7a37e0a2beb.png {STEAM_CLAN_IMAGE}/31699457/4bdd440f9e361dbbff86457e2cf9ebee4bb97f4e.png *The artbook will initially be released in Traditional Chinese only. A separate English version will be released promptly after for everyone who owns the artbook.
  Read full article on Community Announcements (Sigono_games)

• Announcements·1 Sept 2021Official

  OPUS series sequel OUT NOW!

  Hey everyone! Our epic journey through space is finally ready for you! Please enjoy! {STEAM_CLAN_IMAGE}/31699457/9271d112a95aa21cc25c61720e89ba2a26bb974e.gif 👉 GRAB IT NOW 👈 Venture among the asteroids to search the fabled starsongs, solve the secrets of an ancient myth, and play as a pair of fated lovers, destined to be separated. "No matter how long it takes, I will find you once again." {STEAM_CLAN_IMAGE}/31699457/a49a41653d0e5483b639ebe7d7aef1542c5a3d49.gif OPUS: Echo of Starsong is a narrative puzzle adventure game. Asteroids emitting a sound known as "Starsongs" have become the center of conflict for the immense power they hold. Determined to claim asteroids of his own, a young man ventures out with a girl who can imitate starsongs, lending her voice to unravel an ancient myth deep in the heart of space. Grab Echo of Starsong during launch for 20% off, or get the original soundtrack bundle for an additional discount! {STEAM_CLAN_IMAGE}/31699457/edb7c225681cbc88e5c66ef1a0c3e5f3c3aee507.jpg
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• Announcements·21 Aug 2021Official

  OPUS: Echo of Starsong gets a release date&theme song!

  Hello everyone! Ever since we released the demo, we've been hard at work, tweaking every single detail of the game just to make it perfect when it's on your hands. And good news, the end is finally near! Very soon, you will be able to start your journey to the Thousand Peaks! {STEAM_CLAN_IMAGE}/31699457/56b948419dc2f24aa22e2c7de9c6abfdd1188d35.gif To learn a little bit more about our main protagonists, theme song, and of course, the release date... 👉Watch the Release Date Trailer Now👈 "We will find each other, no matter how long it takes." Exiled by his people, Jun ventures out in search of starsongs to redeem himself. But progress is slow until he saves Eda, a witch who can pick up on the sound of asteroids. However, what appears to be a blessed encounter, will end up becoming a lifelong burden... {STEAM_CLAN_IMAGE}/31699457/1854ebfa13b517a0ea726d1cc87016daac398140.gif Mark your dates and wishlist+follow on Steam, because Echo of Starsong is scheduled to be released on Steam on 9/1/2021! 🔔 We’ve received lots of useful feedback from OPUS: Echo of Starsong demo. Thank you all! To turn these feedback into iteration and polish the game to perfection, we’ll deactivate the demo in 18 hrs. And we hope to bring the best experience when the game launch: )
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