MORDOR.ZIP is a precompiled binary for Win95/NT. It must be run under a different directory than the UNIX version. It must be run from /home/Isengard/mordor/bin and the database must reside in /home/Isengard/mordor/rooms and /home/Isengard/mordor/objmon. You can change this by compiling your own version and setting the path variables in src/mtype.h.