Unofficial .zip files are frequently used to distribute malware, adware, or trojans .
The file corresponds to a legitimate build of the game Sunless Sea , originally released by Failbetter Games around April 2019. Technical Summary Game Version: 2.2.7.3165. Release Date: April 17, 2019. Key Changes in this Build: File: Sunless.Sea.v2.2.7.3165.zip ...
If you have already downloaded this file, it is highly recommended to run it through a multi-engine scanner like VirusTotal before attempting to open or run the executable. Sunless Sea - Release Notes - GOG Database Unofficial