Cosmic Osmo and the Worlds Beyond the Mackerel

Casual· Adventure· Point & Click· 1980s

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.

79% positive · 116 reviews

Done

All announced content has been released

High confidence

Done

All announced content has been released

High confidence

Where to buy

Steam Updated 8 Oct 2026 $2.39 $5.99 −60%

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Evaluation

Cosmic Osmo and the Worlds Beyond the Mackerel is a classic adventure game originally created by Cyan Worlds (the studio behind Myst) and released on Steam as a straightforward port of that classic title. The store description presents it as a completed, self-contained experience with seven worlds to explore, framed explicitly as a finished product ("an early gem from the creators of Myst"). There is no post-launch update history, no DLC, no roadmap, no developer communications about future content, and no indication of any ongoing development activity. The game launched as a complete package and has remained that way.

Evidence

Store description presents the game as a complete, self-contained experience with seven worlds, described as 'an early gem from the creators of Myst' — language consistent with a finished, legacy product

description source content shipped

high

Short description reinforces the game as a complete exploration experience with no mention of updates, additional content, or ongoing development

store metadata source content shipped

medium

Media

Details

Developer

Cyan Worlds, Inc.

Publisher

Cyan Worlds, Inc.

Achievements

—

Platform

Windows

Controller

—

Steam Deck

Not rated

Players

Single-player

Casual Adventure Point & Click 1980s Cartoony Pixel Graphics Family Friendly Walking Simulator Surreal First-Person Exploration Cute 2D Mystery Nostalgia

About this game

You're an Osmo, a strange creature indeed. You explore the galaxy in your spaceship, and the planets you encounter are almost as bizarre as the Osmos themselves. There are seven worlds presented for your consideration, each more goofy and peculiar than the last. 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.