The file racball.exe is a self-extracting zip file (just run it and it unpacks
itself) containing a racquetball game using written using rend386.  To play
it, you'll need to have the Nintendo Powerglove hooked up.  The game was
developed by the folks who bring you PCVR -- see their readme file (in the
racball.exe zipfile) for details about ordering PCVR.

The file pcvrjet.exe is a self-extracting zip file as well.

The file btmate2.zip is a two-player chess game written by Joe Gradecki. 
