Unturned is automatically updated on Steam; therefore, the Steam client cannot be used to download version 2.2.5. Acquisition requires manual download from archival sources.
Primary Sources:
Download Instructions (Web Browser Method): unturned 2.2.5 download
Assuming you have found a legitimate .zip file of Unturned 2.2.5, follow this guide: Unturned is automatically updated on Steam; therefore, the
If you legally own Unturned on Steam (it's free), you can use the Steam Console to download legacy depots. This requires a tool like DepotDownloader or using the Steam CLI. safety and legal considerations for downloading
This resource explains what "Unturned 2.2.5" likely refers to, where and how people typically obtain game updates, safety and legal considerations for downloading, and troubleshooting notes. Assumptions: you mean the PC survival game Unturned (a Steam/Epic/officially-distributed title) and a specific older version numbered 2.2.5.
The Epic Games Store is another popular platform where you can download Unturned 2.2.5: