In addition to d2x, you need some data files to play. On un*x, these files need to go into a shared data directory (/usr/local/share/games/d2x by default). On Windows or DOS, they go in the same directory as the d2x binary. To Play the Descent 2 demo: Place these files into your shared data dir: d2demo.ham d2demo.hog d2demo.pig d2demo.mn2 (distributed with d2x) To Play Descent 2 registered: Place these files into your shared data dir: alien1.pig alien2.pig descent2.ham descent2.hog descent2.s11 descent2.s22 fire.pig groupa.pig ice.pig water.pig To play Descent 1 registered: All the files from Descent 2 registered, plus: Place these files into the missions subdir of your shared data dir: descent.hog descent.msn (distributed with d2x) Note the filenames must be in _lower case_. It's important. Note also that you don't have to run the D2 setup program to extract the files, just unarj descent2.sow from the cd.