File Types
From FreeSpace Wiki
Binary filetypes
*.VP - Container format used to package all kinds of files for release
*.POF - Stores model geometry information for all objects in-game (ie ships, asteroids, etc)
*.PLR/*.PL2 - Store player progress information
*.CSG/*.CSS - Store campaign progress(CSG)/scoring(CSS) information (Obsolete)
*.CS2 - Stores campaign progress and scoring data
*.IBX - Caches model geometry data for fast loading
ASCII/Text filetypes
*.FS2 - Mission files
*.TBL - Store statistics on all kinds of things
*.TBM - Extend table data modularly
*.EFF - Stores information on animated effects