Use a tool like WinRAR or 7-Zip . Right-click part01.rar and select "Extract Here."

Includes Potassium Iodide pills to block radiation and Geiger counters to detect hotspots. You can read the full patch notes on SteamDB or the official Steam News Hub .

The software will automatically pull data from the other parts to reconstruct the full original file.

This update introduced several radiation-themed mechanics to the survival game:

A new high-risk, high-reward POI located in the C3 sector.