While "GOG versions" are popular because they are easy to install, downloading games via torrents from unofficial sources carries significant risks:

The Long Dark is developed by Hinterland Studio, an independent developer. Purchasing the game directly from GOG or Steam ensures you have a safe, legal copy and supports the ongoing development of the "Tales" expansion.

A .torrent file with this naming convention is usually found on third-party file-sharing sites. It contains the metadata needed for a BitTorrent client to download the full GOG installer from other users. Content of the v2.00 Update

This specific version brought several major changes to the frozen wilderness of Great Bear Island:

You won't receive automatic updates, bug fixes, or access to official forums and cloud saves.