In late 2025, Unknown Worlds removed several older versions of Subnautica , including the early 2023 versions, from public Steam branches.
: The removal was a response to a security flaw found in Unity engine versions used since 2017. Subnautica.v17.02.2023.zip
During February 2023, several builds (such as Build 10576834 and 10576699) were uploaded to Steam, though many were not accompanied by official public patch notes. In late 2025, Unknown Worlds removed several older
If you have encountered "Subnautica.v17.02.2023.zip" as a standalone download on a third-party site: In late 2025
: These updates typically focused on backend optimizations, such as depot changes for Win32 and macOS systems, rather than adding new gameplay content.