Ergosphere

You're the newest steward of Thoth Observatory, tasked with researching the strange Kerr black hole SJ-1765—the Sejanus Singularity. The data gathered here is invaluable, so maintain the installation and preserve your sanity until your rotation ends in this deteriorating station.

At a glance

• Platform: Windows, Linux.
• Genres: Adventure, Indie, Simulation, Free To Play.
• Release date: Oct 10, 2025.
• Steam user reviews: 4 user reviews (75% positive).
• Delivered as a Steam library entitlement — activation is handled by Steam.

Minimum

System requirements as published by the developer on Steam.

Activate on Steam

• Open the offer above — it takes you to this game's official Steam store page.
• Buy it there, or if you bought a key elsewhere, open Steam and choose Games → Activate a Product on Steam.
• Enter the product code exactly as it was issued to you.
• The game appears in your Steam library — download and play.

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