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.

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

0 players in-game as of 2026-08-30 13:00 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

Insufficient data
  • · Not enough review history collected yet to judge health.
  • · Top 64% of 11,424 Adventure games in the census by review count.
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 5 of 10 observed days (census price snapshots)

Players online

002026-08-12 00:00 — 0 players2026-08-12 16:00 — 0 players2026-08-13 07:00 — 0 players2026-08-13 23:00 — 0 players2026-08-14 15:00 — 0 players2026-08-15 07:00 — 0 players2026-08-15 23:00 — 0 players2026-08-16 15:00 — 0 players2026-08-17 07:00 — 0 players2026-08-17 23:00 — 0 players2026-08-18 14:00 — 0 players2026-08-19 06:00 — 0 players2026-08-19 22:00 — 0 players2026-08-20 14:00 — 0 players2026-08-21 05:00 — 0 players2026-08-21 21:00 — 0 players2026-08-22 13:00 — 0 players2026-08-23 05:00 — 0 players2026-08-23 20:00 — 0 players2026-08-24 12:00 — 0 players2026-08-25 04:00 — 0 players2026-08-25 20:00 — 0 players2026-08-26 13:00 — 0 players2026-08-27 05:00 — 0 players2026-08-27 20:00 — 0 players2026-08-28 13:00 — 0 players2026-08-29 05:00 — 0 players2026-08-29 21:00 — 0 players2026-08-30 13:00 — 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

11352026-05-29 — 16 pageviews2026-06-01 — 17 pageviews2026-06-04 — 93 pageviews2026-06-07 — 16 pageviews2026-06-10 — 9 pageviews2026-06-13 — 12 pageviews2026-06-16 — 18 pageviews2026-06-19 — 9 pageviews2026-06-22 — 17 pageviews2026-06-25 — 14 pageviews2026-06-28 — 9 pageviews2026-07-01 — 10 pageviews2026-07-04 — 8 pageviews2026-07-07 — 12 pageviews2026-07-10 — 21 pageviews2026-07-13 — 21 pageviews2026-07-16 — 13 pageviews2026-07-19 — 17 pageviews2026-07-22 — 16 pageviews2026-07-25 — 17 pageviews2026-07-28 — 12 pageviews2026-07-31 — 8 pageviews2026-08-03 — 26 pageviews2026-08-06 — 20 pageviews2026-08-09 — 17 pageviews2026-08-12 — 10 pageviews2026-08-15 — 6 pageviews2026-08-18 — 17 pageviews2026-08-21 — 18 pageviews2026-08-24 — 18 pageviews2026-08-26 — 9 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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