Are you having trouble these files, or were you looking for a patch note article for this specific build?
: The .part2.rar extension indicates that the full game installer was split into multiple smaller chunks (multi-volume archives) to make downloading or uploading easier. You cannot extract this file alone; you need all parts (Part 1, Part 2, etc.) in the same folder to successfully unpack the game. Safety and Security Warning ATOM.RPG.Trudograd.Build.9669320.part2.rar
If you're looking for the game itself, the safest way to play is through the official ATOM RPG: Trudograd Steam page or GOG, where the game is regularly updated and verified safe. Are you having trouble these files, or were