The Game Census
Cosmic Osmo and the Worlds Beyond the Mackerel cover art

Cosmic Osmo and the Worlds Beyond the Mackerel

Cyan Worlds, Inc.

Steam

AdventureCasual

Modes: Single player

Releases: 1989 (Mac), Jul 1989 (PC (Microsoft Windows))

Cosmic Osmo is a game about exploration and discovery, not winning or challenges. Children and adults will both find something to enjoy in this early gem from the creators of Myst.

Cosmic Osmo and the Worlds Beyond the Mackerel is an Adventure, Casual game, priced at $5.99, with a Mostly Positive review sentiment (79% of 116 reviews) and an estimated owner base of 20,000 .. 50,000.

0
playing now
79%
positive of 116 reviews
Mostly Positive
steam's rating (official)
20,000–50,000
owners (SteamSpy est.)
60/100
IGDB user rating (1 ratings)
gold
deck/linux tier (ProtonDB)
Unknown
Steam Deck (Valve)
SteamOS: 0
$5.99
steam price (US)

0 players in-game as of 2026-10-14 08:00 UTC (census sample)

Cosmic Osmo and the Worlds Beyond the Mackerel is a graphic adventure computer game for the Macintosh computer line created by Cyan, Inc. It was published in 1989 and won the 1990 Mac User's Editors' Choice Award for the "Best Recreational Program" category.

Health check

Quiet
  • · 0 players in-game at the last census sample.
  • · 2 reviews in the last 8 weeks (~0/week).
  • · Review velocity down 50% vs the prior 8 weeks.
  • · Top 38% of 28,739 Adventure games in the census by review count.

Health tier since 2026-09-01

Estimated sales: 2.3k–7.0k copies

Review-multiple estimate from 116 total reviews — how this is computed.

All-time low: $1.19 at Steam (2016-02-05) · bundled 3×via IsThereAnyDeal

12-month high $5.99 · on sale 4 of 8 observed days (census price snapshots)

Review momentum

PositiveNegative
3320112026Week of 2011-02-01: 1 positiveWeek of 2011-03-01: 1 positiveWeek of 2011-09-01: 1 positiveWeek of 2011-10-01: 1 positiveWeek of 2011-12-01: 1 positiveWeek of 2012-08-01: 1 positiveWeek of 2012-09-01: 2 positiveWeek of 2012-12-01: 1 positiveWeek of 2013-09-01: 2 positiveWeek of 2013-12-01: 1 positiveWeek of 2014-01-01: 1 positiveWeek of 2014-02-01: 2 positiveWeek of 2014-04-01: 1 negativeWeek of 2014-06-01: 3 positiveWeek of 2014-07-01: 1 positiveWeek of 2014-08-01: 1 negativeWeek of 2014-09-01: 1 positiveWeek of 2014-10-01: 1 positiveWeek of 2014-10-01: 1 negativeWeek of 2014-12-01: 1 positiveWeek of 2015-01-01: 1 positiveWeek of 2015-03-01: 1 positiveWeek of 2015-03-01: 1 negativeWeek of 2015-08-01: 1 negativeWeek of 2015-09-01: 1 positiveWeek of 2016-01-01: 1 positiveWeek of 2016-04-01: 2 positiveWeek of 2016-05-01: 1 positiveWeek of 2016-11-01: 3 positiveWeek of 2016-12-01: 1 negativeWeek of 2017-01-01: 1 positiveWeek of 2017-03-01: 1 positiveWeek of 2017-03-01: 1 negativeWeek of 2017-05-01: 1 positiveWeek of 2017-07-01: 1 positiveWeek of 2017-10-01: 1 positiveWeek of 2017-10-01: 1 negativeWeek of 2017-11-01: 1 positiveWeek of 2018-01-01: 1 positiveWeek of 2018-01-01: 2 negativeWeek of 2018-07-01: 2 negativeWeek of 2018-08-01: 1 positiveWeek of 2018-10-01: 1 positiveWeek of 2018-11-01: 1 positiveWeek of 2018-12-01: 1 negativeWeek of 2019-06-01: 1 positiveWeek of 2019-07-01: 1 positiveWeek of 2019-07-01: 1 negativeWeek of 2019-09-01: 1 positiveWeek of 2019-11-01: 1 positiveWeek of 2019-12-01: 2 positiveWeek of 2020-01-01: 1 positiveWeek of 2020-02-01: 1 positiveWeek of 2020-03-01: 2 positiveWeek of 2020-05-01: 1 positiveWeek of 2020-05-01: 1 negativeWeek of 2020-07-01: 1 positiveWeek of 2020-08-01: 1 positiveWeek of 2020-09-01: 1 negativeWeek of 2020-10-01: 1 positiveWeek of 2020-10-01: 1 negativeWeek of 2021-01-01: 1 negativeWeek of 2021-06-01: 1 positiveWeek of 2021-08-01: 2 positiveWeek of 2022-01-01: 1 positiveWeek of 2022-03-01: 1 positiveWeek of 2022-06-01: 1 positiveWeek of 2023-10-01: 3 positiveWeek of 2023-12-01: 2 positiveWeek of 2023-12-01: 1 negativeWeek of 2024-01-01: 1 negativeWeek of 2024-05-01: 1 positiveWeek of 2024-10-01: 1 positiveWeek of 2024-12-01: 1 positiveWeek of 2025-03-01: 1 positiveWeek of 2025-06-01: 1 positive
Weekly review counts (Steam review histogram). Positive above the line, negative below.

Players online

002026-09-15 09:00 — 0 players2026-09-16 17:00 — 0 players2026-09-18 00:00 — 0 players2026-09-19 08:00 — 0 players2026-09-20 15:00 — 0 players2026-09-21 23:00 — 0 players2026-09-23 07:00 — 0 players2026-09-24 14:00 — 0 players2026-09-25 22:00 — 0 players2026-09-27 05:00 — 0 players2026-09-28 13:00 — 0 players2026-09-29 20:00 — 0 players2026-10-01 04:00 — 0 players2026-10-02 11:00 — 0 players2026-10-03 19:00 — 0 players2026-10-05 03:00 — 0 players2026-10-06 11:00 — 0 players2026-10-07 18:00 — 0 players2026-10-09 02:00 — 0 players2026-10-10 09:00 — 0 players2026-10-11 17:00 — 0 players2026-10-13 00:00 — 0 players2026-10-14 08:00 — 0 players
Concurrent players, hourly average, last 30 days (census samples).

Price history

$29.99$1.192015-01-012026-08-082015-01-01 — best price $14.992015-05-14 — best price $5.992015-12-01 — best price $5.992016-01-04 — best price $5.992016-02-12 — best price $5.992016-07-04 — best price $5.992018-07-05 — best price $5.992018-11-01 — best price $5.992018-11-27 — best price $5.992019-01-03 — best price $5.992019-02-11 — best price $5.992019-07-09 — best price $5.992019-11-01 — best price $5.992019-12-03 — best price $5.992020-01-27 — best price $5.992020-07-09 — best price $5.992021-01-05 — best price $5.992021-02-15 — best price $5.992022-02-03 — best price $5.992022-07-07 — best price $5.992022-11-29 — best price $5.992023-01-05 — best price $5.992023-03-23 — best price $5.992023-07-13 — best price $5.992023-11-28 — best price $5.992024-01-04 — best price $5.992024-03-21 — best price $5.992024-07-11 — best price $5.992024-12-04 — best price $5.992025-01-02 — best price $5.992025-03-20 — best price $5.992025-07-10 — best price $5.992025-10-06 — best price $5.992026-01-05 — best price $5.992026-03-26 — best price $5.992026-07-09 — best price $5.992026-08-08 — best price $5.99
Lowest recorded price across tracked stores, per day (census snapshots).

Attention

9362026-05-29 — 16 pageviews2026-06-02 — 17 pageviews2026-06-06 — 26 pageviews2026-06-10 — 9 pageviews2026-06-14 — 11 pageviews2026-06-18 — 8 pageviews2026-06-22 — 17 pageviews2026-06-26 — 12 pageviews2026-06-30 — 7 pageviews2026-07-04 — 8 pageviews2026-07-08 — 11 pageviews2026-07-12 — 9 pageviews2026-07-16 — 13 pageviews2026-07-20 — 22 pageviews2026-07-24 — 13 pageviews2026-07-28 — 12 pageviews2026-08-01 — 17 pageviews2026-08-05 — 14 pageviews2026-08-09 — 17 pageviews2026-08-13 — 12 pageviews2026-08-17 — 17 pageviews2026-08-21 — 18 pageviews2026-08-25 — 21 pageviews2026-08-29 — 12 pageviews2026-09-02 — 6 pageviews2026-09-06 — 8 pageviews2026-09-10 — 8 pageviews2026-09-14 — 6 pageviews2026-09-18 — 9 pageviews2026-09-22 — 9 pageviews2026-09-26 — 7 pageviews2026-09-30 — 13 pageviews2026-10-04 — 17 pageviews2026-10-07 — 8 pageviews
Daily Wikipedia pageviews (attention proxy, census-recorded).

Details

WindowsSingle-playerFamily Sharing

1 supported languages: English

Player tags

2DCute1980sCasualMysterySurrealCartoonyAdventureExplorationFirst-Person

Census log

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

Players also track

SubnauticaStar Control®: OriginsImmortal: UnchainedMasochisiaRusty Lake: RootsEtherbornThe Room 4: Old Sins

Similarity via IGDB.

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