The version number corresponds to a specific patch released for the game's Foundation Update . Typically, a .rar file for this game version would include:
: Files like Foundation.exe used to launch the game. Foundation.v1.9.1.3.rar
The file appears to be a compressed archive containing an update or specific version of the game Foundation , a grid-less medieval city-building simulation. Expected Contents The version number corresponds to a specific patch
: Documentation ( readme.txt or instructions.txt ) detailing installation or change logs. Foundation.v1.9.1.3.rar
This particular version is part of the "Foundation Update" series, which introduced significant overhauls to the game's mechanics, UI, and optimization. If you are looking for the official source or official patch notes, you can find them on the page on Steam Community Announcements .