How many copies has OPUS: Rocket of Whispers sold?

indielist estimates OPUS: Rocket of Whispers has sold between 71,859 and 167,671 units (median 119,765), derived from its 1,409 Steam reviews with the white-box Boxleiter v1.0 method. The full breakdown is shown on the page.

Who developed OPUS: Rocket of Whispers?

OPUS: Rocket of Whispers was developed by SIGONO INC. and published by SIGONO INC..

Who published OPUS: Rocket of Whispers?

OPUS: Rocket of Whispers was published by SIGONO INC., developed by SIGONO INC.. See SIGONO INC.'s full catalogue and submission status on indielist.

When was OPUS: Rocket of Whispers released?

OPUS: Rocket of Whispers was released in 2018.

How many reviews does OPUS: Rocket of Whispers have on Steam?

OPUS: Rocket of Whispers has 1,409 Steam reviews, of which 92% are positive.

Is OPUS: Rocket of Whispers worth playing?

Steam players rate OPUS: Rocket of Whispers 92% positive across 1,409 reviews. indielist doesn't score games editorially; it surfaces public review sentiment and a white-box sales estimate so you can judge reception and reach yourself.

OPUS: Rocket of Whispers

Feb 7, 2018 Adventure $14.99

Developer SIGONO INC. Publisher SIGONO INC.

Profile updated Jul 2026

Adventure indie game OPUS: Rocket of Whispers comes from SIGONO Inc., which also publishes it. Released in 2018, it has 1,692 Steam reviews with 92% positive sentiment, and launched at an initial price of $14.99.

OPUS: Rocket of Whispers is a 2018 Adventure game developed by SIGONO INC. and published by SIGONO INC.. On Steam it has gathered 1,409 player reviews, 92% of them positive, which counts as a very positive reception among indie titles in the Adventure category. The game is available on mac, windows, and launched at $15. The pairing of developer SIGONO INC. with publisher SIGONO INC. is one of the studio-publisher relationships indielist tracks, letting players find comparable games and letting developers and investors study how Adventure projects reach the market. indielist's white-box method estimates its lifetime sales at roughly 72,000 to 168,000 units, with the full Boxleiter factor breakdown shown on this page rather than a single black-box figure. Within indielist's catalog of indie games mapped to their studios, publishers, and funding, OPUS: Rocket of Whispers can be compared against similar Adventure titles and benchmarked on review counts and estimated sales.

Reviews

1,409

Positive

92%

Steam appid

742250

Engine

Unknown

Players (snapshot)

Unavailable

Sales estimate

v1.0

72K to 168K

units (median: 120K)

≈ $615K to $1.4M modeled net revenue (fixed store-cut, refund, and regional-price assumptions applied)

72K median 168K

+ How is this calculated?

1,409 reviews × NB(85) = 119,765 median units

Factor	Adjustment
base	+50
year_2018	+15
price_$15	0
positive_92%	+10
genre_Adventure	+10
final NB	85

Heuristic display range: median × [0.6, 1.4]. Boundary protection: NB ∈ [15, 150].

Methodology & limitations

Sales estimates use an additive Boxleiter-derived heuristic against public Steam review counts. They are not authoritative sales data, and the fixed display range is not a statistically validated confidence interval. Actual results may fall outside it, especially for deeply discounted or bundle-heavy titles. Algorithm version v1.0. Read the exact method and validation status.

indielist estimates lifetime unit sales for OPUS: Rocket of Whispers at roughly 72,000 to 168,000 copies, with a median around 120,000, derived from its 1,409 Steam reviews using a multi-factor Boxleiter method (version v1.0). That median maps to approximately $1.0M in net revenue after Steam's 30% cut, regional pricing, and refunds. Unlike black-box trackers, the full calculation is shown on this page: a base review-to-sales multiplier is adjusted for release year, launch price, review sentiment, studio size, and genre, and every adjustment is listed so developers, publishers, and investors can audit exactly how the figure was reached. The range itself reflects genuine uncertainty — review-to-sales ratios vary widely between games — so indielist publishes a low, median, and high band rather than a false-precision single number, and treats free-to-play, heavily discounted, and bundle-distributed titles as having wider error margins still.

Price history

8 observed days · window low $2.25

Across 8 observed UTC days from 2026-07-15 to 2026-07-22, the daily lowest tracked USD price across stores ranged from $2.25 to $8.99. The tracked-window low was $2.25 on 2026-07-15.

Real store observations · daily lowest tracked USD price across stores · missing days are not filled.

Where to buy

Affiliate disclosure

GOG.com -75%

$2.25 Buy
Steam reference

$14.99 Buy
Green Man Gaming

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Fanatical

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Humble Store

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Latest tracked store observations (2026-07-22 21:25 UTC), cheapest first. Prices may have changed since observation. Some are affiliate links — we may earn a commission at no extra cost to you. Learn more.

Platforms

macwindows

Genres

AdventureIndie

Frequently asked questions

How many copies has OPUS: Rocket of Whispers sold?: indielist estimates OPUS: Rocket of Whispers has sold between 71,859 and 167,671 units (median 119,765), derived from its 1,409 Steam reviews with the white-box Boxleiter v1.0 method. The full breakdown is shown on the page.
Who developed OPUS: Rocket of Whispers?: OPUS: Rocket of Whispers was developed by SIGONO INC. and published by SIGONO INC..
Who published OPUS: Rocket of Whispers?: OPUS: Rocket of Whispers was published by SIGONO INC., developed by SIGONO INC.. See SIGONO INC.'s full catalogue and submission status on indielist.
When was OPUS: Rocket of Whispers released?: OPUS: Rocket of Whispers was released in 2018.
How many reviews does OPUS: Rocket of Whispers have on Steam?: OPUS: Rocket of Whispers has 1,409 Steam reviews, of which 92% are positive.
Is OPUS: Rocket of Whispers worth playing?: Steam players rate OPUS: Rocket of Whispers 92% positive across 1,409 reviews. indielist doesn't score games editorially; it surfaces public review sentiment and a white-box sales estimate so you can judge reception and reach yourself.

Players looking for games like OPUS: Rocket of Whispers can compare it on indielist against semantically similar Adventure titles such as Subnautica, Raft, Satisfactory, Human Fall Flat, ranked by shared tags and genre rather than by ad spend. On the developer side, SIGONO INC.'s other releases and SIGONO INC.'s wider catalog are one click away, letting developers benchmark where OPUS: Rocket of Whispers sits among a studio's body of work and how its publisher's portfolio performs. Because indielist maps studios, publishers, games, and funding into one connected graph, the same OPUS: Rocket of Whispers page serves three audiences at once: players hunting their next Adventure game, developers studying how comparable projects were positioned and what they sold, and investors tracing which teams and labels are active in the space. A machine-readable markdown mirror of this page is published at the same path with a .md suffix for AI assistants, and its review, price, and sales-estimate figures are refreshed on a schedule rather than frozen at launch.

Matched from shared Steam tags and primary genre. Review count breaks ties; it is not a personal recommendation score.