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 · Perspectives: Third person

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).

17
playing now
96%
positive of 9.5k reviews
Overwhelmingly Positive
steam's rating (official)
200,000–500,000
owners (SteamSpy est.)
78/100
IGDB user rating (6 ratings)
1
Nexus mods (26 downloads)
14h
to beat · rushed 13h
platinum
deck/linux tier (ProtonDB)
Verified
Steam Deck (Valve)
SteamOS: Playable
$9.99
steam price (US)

17 players in-game as of 2026-10-14 12:00 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.

Trailer

OPUS: Echo of Starsong - Full Bloom Edition trailer thumbnail

OPUS: Echo of Starsong - Full Bloom Edition - Launch Trailer - Nintendo Switch

≈23,932 YouTube results for this game's trailer search

Health check

Healthy
  • · 17 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 4% of 28,739 Adventure games in the census by review count.
Estimated sales: 189k–425k copies

Review-multiple estimate from 9,451 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 62 of 86 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

4012026-09-14 21:00 — 2 players2026-09-16 06:00 — 6 players2026-09-17 13:00 — 12 players2026-09-18 21:00 — 2 players2026-09-20 04:00 — 6 players2026-09-21 12:00 — 7 players2026-09-22 19:00 — 1 players2026-09-24 03:00 — 4 players2026-09-25 10:00 — 6 players2026-09-26 18:00 — 7 players2026-09-28 01:00 — 1 players2026-09-29 09:00 — 2 players2026-09-30 16:00 — 6 players2026-10-02 00:00 — 2 players2026-10-03 07:00 — 17 players2026-10-04 16:00 — 12 players2026-10-05 23:00 — 2 players2026-10-07 07:00 — 18 players2026-10-08 14:00 — 20 players2026-10-09 22:00 — 2 players2026-10-11 05:00 — 14 players2026-10-12 13:00 — 40 players2026-10-13 20:00 — 5 players2026-10-14 12:00 — 17 players
Concurrent players, hourly average, last 30 days (census samples).
1296Sep 2021Aug 2026Sep 2021 — avg 129 · peak 544Nov 2021 — avg 44 · peak 159Jan 2022 — avg 51 · peak 148Mar 2022 — avg 18 · peak 57May 2022 — avg 30 · peak 104Jul 2022 — avg 39 · peak 121Sep 2022 — avg 22 · peak 80Nov 2022 — avg 15 · peak 47Jan 2023 — avg 16 · peak 50Mar 2023 — avg 15 · peak 76May 2023 — avg 9 · peak 35Jul 2023 — avg 16 · peak 53Sep 2023 — avg 16 · peak 67Nov 2023 — avg 15 · peak 52Jan 2024 — avg 12 · peak 44Mar 2024 — avg 17 · peak 61May 2024 — avg 12 · peak 42Jul 2024 — avg 17 · peak 53Sep 2024 — avg 13 · peak 41Nov 2024 — avg 14 · peak 45Jan 2025 — avg 12 · peak 36Mar 2025 — avg 8 · peak 35May 2025 — avg 10 · peak 32Jul 2025 — avg 10 · peak 30Sep 2025 — avg 7 · peak 34Nov 2025 — avg 11 · peak 44Jan 2026 — avg 8 · peak 28Mar 2026 — avg 7 · peak 23May 2026 — avg 14 · peak 53Jul 2026 — avg 12 · peak 49Aug 2026 — avg 11 · peak 36
Monthly average players (source: steamcharts.com) — history via steamcharts.com; live census sampling since Aug 2026.

Price history

$24.99$9.992021-09-012026-10-142021-09-01 — best price $14.392021-11-24 — best price $14.392022-01-05 — best price $17.992022-04-04 — best price $13.492022-07-29 — best price $17.492022-10-14 — best price $17.492022-12-05 — best price $17.492023-02-02 — best price $16.242023-04-11 — best price $14.992023-07-07 — best price $16.242023-09-25 — best price $24.992024-01-04 — best price $24.992024-02-14 — best price $12.492024-03-25 — best price $12.492024-05-29 — best price $24.992024-08-01 — best price $24.992024-11-05 — best price $12.492025-01-03 — best price $24.992025-04-03 — best price $24.992025-09-21 — best price $12.492025-10-20 — best price $12.492026-01-08 — best price $12.492026-03-05 — best price $12.492026-05-12 — best price $24.992026-07-30 — best price $9.992026-08-30 — best price $9.992026-09-07 — best price $9.992026-09-15 — best price $9.992026-09-23 — best price $24.992026-10-01 — best price $9.992026-10-09 — best price $24.992026-10-14 — best price $9.99
Lowest recorded price across tracked stores, per day (census snapshots).

Attention

4642026-05-28 — 10 pageviews2026-06-01 — 27 pageviews2026-06-05 — 19 pageviews2026-06-09 — 22 pageviews2026-06-13 — 32 pageviews2026-06-17 — 18 pageviews2026-06-21 — 21 pageviews2026-06-25 — 46 pageviews2026-06-29 — 26 pageviews2026-07-03 — 23 pageviews2026-07-07 — 36 pageviews2026-07-11 — 18 pageviews2026-07-15 — 23 pageviews2026-07-19 — 19 pageviews2026-07-23 — 18 pageviews2026-07-27 — 20 pageviews2026-07-31 — 27 pageviews2026-08-04 — 17 pageviews2026-08-08 — 23 pageviews2026-08-12 — 39 pageviews2026-08-16 — 22 pageviews2026-08-20 — 27 pageviews2026-08-24 — 26 pageviews2026-08-28 — 26 pageviews2026-09-01 — 25 pageviews2026-09-05 — 23 pageviews2026-09-09 — 22 pageviews2026-09-13 — 19 pageviews2026-09-17 — 4 pageviews2026-09-21 — 11 pageviews2026-09-25 — 17 pageviews2026-09-29 — 14 pageviews2026-10-03 — 13 pageviews2026-10-06 — 27 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

Post-launch support: 7 DLC released, first 2021-09-01, latest 2023-03-13 (Steam store data)

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®: OriginsTanziaOmensight: Definitive EditionWeapon Shop FantasyEternity: The Last UnicornDungeon Of Dragon KnightRebel Galaxy OutlawTorchlight III

Similarity via IGDB.

Official site ↗Discord ↗Wikipedia ↗