How many copies has OPUS: The Day We Found Earth sold?

indielist estimates OPUS: The Day We Found Earth has sold between 82,500 and 192,500 units (median 137,500), derived from its 1,375 Steam reviews with the white-box Boxleiter v1.0 method. The full breakdown is shown on the page.

Who developed OPUS: The Day We Found Earth?

OPUS: The Day We Found Earth was developed by SIGONO INC. and published by SIGONO INC..

Who published OPUS: The Day We Found Earth?

OPUS: The Day We Found Earth was published by SIGONO INC., developed by SIGONO INC.. See SIGONO INC.'s full catalogue and submission status on indielist.

When was OPUS: The Day We Found Earth released?

OPUS: The Day We Found Earth was released in 2016.

How many reviews does OPUS: The Day We Found Earth have on Steam?

OPUS: The Day We Found Earth has 1,375 Steam reviews, of which 87% are positive.

Is OPUS: The Day We Found Earth worth playing?

Steam players rate OPUS: The Day We Found Earth 87% positive across 1,375 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: The Day We Found Earth

Apr 22, 2016 Adventure $14.99

Developer SIGONO INC. Publisher SIGONO INC.

Profile updated Jul 2026

Adventure indie game OPUS: The Day We Found Earth launched in 2016 from developer and publisher SIGONO INC. It has 1,700 Steam reviews with 87% positive sentiment and an initial price of $14.99.

OPUS: The Day We Found Earth is a 2016 Adventure game developed by SIGONO INC. and published by SIGONO INC.. On Steam it has gathered 1,375 player reviews, 87% 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 83,000 to 193,000 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: The Day We Found Earth can be compared against similar Adventure titles and benchmarked on review counts and estimated sales.

Reviews

1,375

Positive

87%

Steam appid

457680

Engine

Unknown

Players (snapshot)

Unavailable

Sales estimate

v1.0

83K to 193K

units (median: 138K)

≈ $706K to $1.6M modeled net revenue (fixed store-cut, refund, and regional-price assumptions applied)

83K median 193K

+ How is this calculated?

1,375 reviews × NB(100) = 137,500 median units

Factor	Adjustment
base	+50
year_2016	+30
price_$15	0
positive_87%	+10
genre_Adventure	+10
final NB	100

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: The Day We Found Earth at roughly 83,000 to 193,000 copies, with a median around 138,000, derived from its 1,375 Steam reviews using a multi-factor Boxleiter method (version v1.0). That median maps to approximately $1.2M 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

7 observed days · window low $2.25

Across 7 observed UTC days from 2026-07-17 to 2026-07-24, the daily lowest tracked USD price across stores ranged from $2.25 to $8.99. The tracked-window low was $2.25 on 2026-07-17.

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 (2026-07-24 06:07 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: The Day We Found Earth sold?: indielist estimates OPUS: The Day We Found Earth has sold between 82,500 and 192,500 units (median 137,500), derived from its 1,375 Steam reviews with the white-box Boxleiter v1.0 method. The full breakdown is shown on the page.
Who developed OPUS: The Day We Found Earth?: OPUS: The Day We Found Earth was developed by SIGONO INC. and published by SIGONO INC..
Who published OPUS: The Day We Found Earth?: OPUS: The Day We Found Earth was published by SIGONO INC., developed by SIGONO INC.. See SIGONO INC.'s full catalogue and submission status on indielist.
When was OPUS: The Day We Found Earth released?: OPUS: The Day We Found Earth was released in 2016.
How many reviews does OPUS: The Day We Found Earth have on Steam?: OPUS: The Day We Found Earth has 1,375 Steam reviews, of which 87% are positive.
Is OPUS: The Day We Found Earth worth playing?: Steam players rate OPUS: The Day We Found Earth 87% positive across 1,375 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: The Day We Found Earth 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: The Day We Found Earth 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: The Day We Found Earth 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.