Okay, so maybe there's some corruption on one of the install files. Clean it out to start anew. From xterm as root: (and for the love of god be careful with these recursive purge commands as root) rm -Rf /home/user/.duke3d rm -Rf /media/mmc1/share/duke3d/* dpkg -r duke3d Then re-download the .deb file and the .grp file. Now reinstall: dpkg -i duke3d_1.5.8-0maemo2_armel.deb Move the newly downloaded duke3d.grp file to the /media/mmc1/share/duke3d directory and keep everything lowercase. Try and launch the game.