The Game Census
OPUS: Echo of Starsong - Full Bloom Edition cover art

OPUS: Echo of Starsong - Full Bloom Edition

SIGONO INC. · 2021-08-31

SteamGOG

AdventureIndie

Modes: Single player

Releases: Aug 31, 2021 (Mac), Aug 31, 2021 (PC (Microsoft Windows)), Nov 17, 2022 (iOS)

Echo of Starsong is a visual novel style adventure game. Eda, a girl who can hear mysterious sound waves known as starsong, crosses paths with a young man in search of their source. Together, they venture out to the heart of space to unravel an ancient myth.

OPUS: Echo of Starsong - Full Bloom Edition is a 2021 Adventure and Indie game priced at $9.99, with an estimated 200,000 .. 500,000 owners and an Overwhelmingly Positive sentiment (96% of 9401 reviews).

7
playing now
96%
positive of 9.4k reviews
Overwhelmingly Positive
steam rating
200,000–500,000
owners (SteamSpy est.)
78/100
IGDB user rating (6 ratings)
14h
to beat · rushed 13h
platinum
deck/linux tier (ProtonDB)
$9.99
steam price (US)

7 players in-game as of 2026-08-30 02:00 UTC (census sample)

Opus: Echo of Starsong is a text-driven side-scrolling adventure game developed by Taiwanese independent studio SIGONO. It is the third installment of the Opus series, after Opus: The Day We Found Earth and Opus: Rocket of Whispers. Like its predecessors, the game focuses on story, puzzles and exploration.

Health check

Healthy
  • · 7 players in-game at the last census sample.
  • · 351 reviews in the last 8 weeks (~44/week).
  • · Review velocity up 5% vs the prior 8 weeks.
  • · Current weekly pace is under 5% of the all-time peak week (1,764 reviews).
  • · Top 8% of 11,312 Adventure games in the census by review count.
Estimated sales: 188k–423k copies

Review-multiple estimate from 9,401 total reviews — how this is computed.

Current store prices

GOG$9.99-60%

Deal snapshots via CheapShark, refreshed daily.

All-time low: $9.99 at GOG (2026-06-17) · bundled 1×via IsThereAnyDeal

12-month high $24.99 · on sale 30 of 50 observed days · at its all-time low (census price snapshots)

Review momentum

PositiveNegative
1.7k1.7k20212026Week of 2021-09-01: 1,725 positiveWeek of 2021-09-01: 39 negativeWeek of 2021-10-01: 385 positiveWeek of 2021-10-01: 7 negativeWeek of 2021-11-01: 571 positiveWeek of 2021-11-01: 14 negativeWeek of 2021-12-01: 436 positiveWeek of 2021-12-01: 17 negativeWeek of 2022-01-01: 482 positiveWeek of 2022-01-01: 25 negativeWeek of 2022-02-01: 307 positiveWeek of 2022-02-01: 5 negativeWeek of 2022-03-01: 161 positiveWeek of 2022-03-01: 4 negativeWeek of 2022-04-01: 237 positiveWeek of 2022-04-01: 9 negativeWeek of 2022-05-01: 215 positiveWeek of 2022-05-01: 5 negativeWeek of 2022-06-01: 263 positiveWeek of 2022-06-01: 9 negativeWeek of 2022-07-01: 284 positiveWeek of 2022-07-01: 7 negativeWeek of 2022-08-01: 190 positiveWeek of 2022-08-01: 14 negativeWeek of 2022-09-01: 126 positiveWeek of 2022-09-01: 9 negativeWeek of 2022-10-01: 111 positiveWeek of 2022-10-01: 2 negativeWeek of 2022-11-01: 136 positiveWeek of 2022-11-01: 4 negativeWeek of 2022-12-01: 112 positiveWeek of 2022-12-01: 7 negativeWeek of 2023-01-01: 134 positiveWeek of 2023-01-01: 6 negativeWeek of 2023-02-01: 176 positiveWeek of 2023-02-01: 6 negativeWeek of 2023-03-01: 99 positiveWeek of 2023-03-01: 5 negativeWeek of 2023-04-01: 104 positiveWeek of 2023-05-01: 69 positiveWeek of 2023-05-01: 6 negativeWeek of 2023-06-01: 106 positiveWeek of 2023-06-01: 6 negativeWeek of 2023-07-01: 117 positiveWeek of 2023-07-01: 2 negativeWeek of 2023-08-01: 93 positiveWeek of 2023-08-01: 4 negativeWeek of 2023-09-01: 83 positiveWeek of 2023-09-01: 4 negativeWeek of 2023-10-01: 44 positiveWeek of 2023-10-01: 8 negativeWeek of 2023-11-01: 70 positiveWeek of 2023-11-01: 3 negativeWeek of 2023-12-01: 49 positiveWeek of 2023-12-01: 7 negativeWeek of 2024-01-01: 58 positiveWeek of 2024-01-01: 5 negativeWeek of 2024-02-01: 157 positiveWeek of 2024-02-01: 8 negativeWeek of 2024-03-01: 98 positiveWeek of 2024-03-01: 9 negativeWeek of 2024-04-01: 87 positiveWeek of 2024-04-01: 4 negativeWeek of 2024-05-01: 64 positiveWeek of 2024-05-01: 4 negativeWeek of 2024-06-01: 55 positiveWeek of 2024-06-01: 2 negativeWeek of 2024-07-01: 91 positiveWeek of 2024-07-01: 8 negativeWeek of 2024-08-01: 79 positiveWeek of 2024-08-01: 5 negativeWeek of 2024-09-01: 55 positiveWeek of 2024-09-01: 1 negativeWeek of 2024-10-01: 62 positiveWeek of 2024-10-01: 2 negativeWeek of 2024-11-01: 81 positiveWeek of 2024-11-01: 1 negativeWeek of 2024-12-01: 59 positiveWeek of 2024-12-01: 11 negativeWeek of 2025-01-01: 52 positiveWeek of 2025-01-01: 4 negativeWeek of 2025-02-01: 40 positiveWeek of 2025-02-01: 4 negativeWeek of 2025-03-01: 42 positiveWeek of 2025-03-01: 5 negativeWeek of 2025-04-01: 30 positiveWeek of 2025-04-01: 2 negativeWeek of 2025-05-01: 44 positiveWeek of 2025-06-01: 33 positiveWeek of 2025-06-01: 1 negativeWeek of 2025-07-01: 55 positiveWeek of 2025-07-01: 2 negativeWeek of 2025-08-01: 19 positiveWeek of 2025-08-01: 3 negativeWeek of 2025-09-01: 32 positiveWeek of 2025-09-01: 3 negativeWeek of 2025-10-01: 53 positiveWeek of 2025-10-01: 2 negativeWeek of 2025-11-01: 51 positiveWeek of 2025-11-01: 3 negativeWeek of 2025-12-01: 33 positiveWeek of 2025-12-01: 1 negativeWeek of 2026-01-01: 36 positiveWeek of 2026-01-01: 2 negativeWeek of 2026-02-01: 29 positiveWeek of 2026-02-01: 3 negativeWeek of 2026-03-01: 34 positiveWeek of 2026-03-01: 2 negativeWeek of 2026-04-01: 30 positiveWeek of 2026-04-01: 2 negativeWeek of 2026-05-01: 68 positiveWeek of 2026-05-01: 8 negativeWeek of 2026-06-01: 33 positiveWeek of 2026-06-01: 2 negativeWeek of 2026-07-01: 58 positiveWeek of 2026-07-01: 10 negativeWeek of 2026-08-01: 15 positiveWeek of 2026-08-01: 2 negative
Weekly review counts (Steam review histogram). Positive above the line, negative below.

Players online

3112026-08-07 00:00 — 3 players2026-08-07 08:00 — 15 players2026-08-07 16:00 — 26 players2026-08-08 00:00 — 7 players2026-08-08 08:00 — 21 players2026-08-08 16:00 — 16 players2026-08-09 00:00 — 6 players2026-08-09 06:00 — 25 players2026-08-09 14:00 — 31 players2026-08-09 22:00 — 4 players2026-08-10 06:00 — 15 players2026-08-10 15:00 — 24 players2026-08-10 23:00 — 1 players2026-08-11 07:00 — 13 players2026-08-11 15:00 — 27 players2026-08-12 22:00 — 2 players2026-08-14 06:00 — 13 players2026-08-15 14:00 — 23 players2026-08-16 22:00 — 3 players2026-08-18 05:00 — 13 players2026-08-19 13:00 — 5 players2026-08-20 20:00 — 4 players2026-08-22 04:00 — 10 players2026-08-23 11:00 — 18 players2026-08-24 19:00 — 6 players2026-08-26 03:00 — 8 players2026-08-27 11:00 — 10 players2026-08-28 19:00 — 6 players2026-08-30 02:00 — 7 players
Concurrent players, hourly average, last 30 days (census samples).

Price history

$24.99$9.992021-09-012026-08-302021-09-01 — best price $14.392021-11-18 — best price $14.392021-12-14 — best price $13.492022-01-24 — best price $17.992022-04-04 — best price $13.492022-07-04 — best price $24.992022-09-05 — best price $17.492022-10-28 — best price $24.992022-12-05 — best price $17.492023-01-20 — best price $17.492023-03-16 — best price $14.992023-04-20 — best price $24.992023-07-07 — best price $16.242023-09-12 — best price $16.242023-11-28 — best price $24.992024-01-15 — best price $14.992024-02-14 — best price $12.492024-03-20 — best price $14.992024-05-09 — best price $12.492024-06-14 — best price $12.492024-08-01 — best price $24.992024-10-08 — best price $24.992024-12-04 — best price $24.992025-02-03 — best price $24.992025-04-03 — best price $24.992025-08-15 — best price $12.492025-10-06 — best price $24.992025-11-05 — best price $24.992026-01-08 — best price $12.492026-02-25 — best price $24.992026-03-27 — best price $12.492026-06-09 — best price $12.492026-07-30 — best price $9.992026-08-28 — best price $9.992026-08-30 — best price $9.99
Lowest recorded price across tracked stores, per day (census snapshots).

Attention

4782026-05-28 — 10 pageviews2026-05-31 — 26 pageviews2026-06-03 — 25 pageviews2026-06-06 — 24 pageviews2026-06-09 — 22 pageviews2026-06-12 — 27 pageviews2026-06-15 — 18 pageviews2026-06-18 — 18 pageviews2026-06-21 — 21 pageviews2026-06-24 — 32 pageviews2026-06-27 — 28 pageviews2026-06-30 — 20 pageviews2026-07-03 — 23 pageviews2026-07-06 — 22 pageviews2026-07-09 — 16 pageviews2026-07-12 — 25 pageviews2026-07-15 — 23 pageviews2026-07-18 — 8 pageviews2026-07-21 — 17 pageviews2026-07-24 — 14 pageviews2026-07-27 — 20 pageviews2026-07-30 — 22 pageviews2026-08-02 — 23 pageviews2026-08-05 — 23 pageviews2026-08-08 — 23 pageviews2026-08-11 — 40 pageviews2026-08-14 — 33 pageviews2026-08-17 — 22 pageviews2026-08-20 — 27 pageviews2026-08-23 — 18 pageviews2026-08-25 — 20 pageviews
Daily Wikipedia pageviews (attention proxy, census-recorded).

Completion

40
achievements tracked
88.8%
earned "Chapter 1"
31.6%
median achievement earned by

Global achievement rates from Steam.

Details

WindowsmacOSFull controller supportSingle-playerSteam AchievementsFull controller supportSteam Trading CardsRemote Play on PhoneRemote Play on TabletFamily Sharing7 DLC

3 supported languages: English, Traditional Chinese, Japanese

Console footprint

PlatformPlayers trackedCompletionTrophies/achievements
Xbox One, Windows (Xbox)5,2823%40
Steam (Steam)1,6043%40

Players tracked by Exophase (achievement/trophy trackers) — a sample of the player base, not total sales.

Where its players are

Share of Steam reviews by language (top languages measured) — a proxy for where the player base lives.

Player tags

2DAnimeIndieSpaceAdventureEmotionalSoundtrackStory RichAtmosphericExploration

Census log

Computed from census-recorded observations only — dates are observation dates.

Players also track

Star Control®: OriginsOmensight: Definitive EditionWeapon Shop FantasyEternity: The Last UnicornDungeon Of Dragon KnightRebel Galaxy OutlawTorchlight III

Similarity via IGDB.

Official site ↗Discord ↗Wikipedia ↗