Since the game has retired from Steam, the Itch.io page serves as a hub where the creator may eventually host the full version for download.
The developer has provided the entire game's soundtrack as a free download, which they describe as "vaguely-almost-music". Tetracosm Free Download
The primary feature of available for free download is its playable demo , which allows you to explore the game's abstract world and experience its core mechanics of adventure and discovery. Since the game has retired from Steam, the Itch
Additional gameplay segments, like saving characters in underwater worlds. Tetracosm by Neolark - Itch
A downloadable version for Windows that lets you run around and explore the environment, encounter various "friends and foes," and get a feel for the atmosphere.
Unique hidden items such as artifacts, gems, and plants. Tetracosm by Neolark - Itch.io
While the full game was previously available on Steam, the developer now hosts a Tetracosm page on Itch.io where you can access the following: