CODEX officially shut down in February 2022. Any "new" CODEX releases appearing after that date are often malware disguised as reputable scene releases.
This specific package is an update , meaning it is designed to be applied over an existing installation of the base game (often the v1.5.0 or v1.5.1 release) to bring the game up to version 1.5.3. Update v1.5.3 Key Improvements Scrapnaut.Update.v1.5.3-CODEX.rar
Resolved issues related to save game stability and item duplication. CODEX officially shut down in February 2022
CODEX (a prominent warez group that officially retired in early 2022) Format: .rar (compressed archive) Scrapnaut.Update.v1.5.3-CODEX.rar
Adjusted the durability of certain steampunk gadgets and the consumption rate of oxygen tanks.