Fortress Forever is a HalfLife 2/Orange Box mod which installs but does not run in COG-8.1.4/linux.
You will need a pre-existing HalfLife 2/Orange Box game installation to use this mod -- I tested
this mod with Steam using HalfLife 2/Orange Box as the qualifying dependency. This mod starts, but
fails quietly due to reasons I've not yet discovered...
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