Latest compatible version of Classicube from the original GitHub repository (https://github.com/ClassiCube/ClassiCube) that can be compiled on Classicube for PowerMac PPC running Mac OS X 10.4.

misc/linux/install-desktop-entry.sh

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+DESKTOP_FILE=ClassiCube.desktop
+GAME_DIR=`pwd`
+
+# remove existing ClassiCube desktop entry file
+rm $DESKTOP_FILE
+
+# download ClassiCube icon from github if necessary
+if [ -f "CCicon.png" ]
+then
+  echo "CCicon.png exists already. Skipping download."
+else
+  echo "CCicon.png doesn't exist. Attempting to download it.."
+  wget "https://raw.githubusercontent.com/ClassiCube/classicube/master/misc/CCicon.png"
+fi
+
+# create ClassiCube desktop entry
+echo 'Creating ClassiCube.desktop..'
+cat >> $DESKTOP_FILE << EOF
+[Desktop Entry]
+Type=Application
+Comment=Minecraft Classic inspired sandbox game
+Name=ClassiCube
+Exec=$GAME_DIR/ClassiCube
+Icon=$GAME_DIR/CCicon.png
+Path=$GAME_DIR
+Terminal=false
+Categories=Game;
+Actions=singleplayer;resume;
+
+[Desktop Action singleplayer]
+Name=Start singleplayer
+Exec=$GAME_DIR/ClassiCube --singleplayer
+
+[Desktop Action resume]
+Name=Resume last server
+Exec=$GAME_DIR/ClassiCube --resume
+EOF
+chmod +x $DESKTOP_FILE
+
+echo 'Installing ClassiCube.desktop..'
+# install ClassiCube desktop entry into the system
+sudo desktop-file-install --dir=/usr/share/applications ClassiCube.desktop
+sudo update-desktop-database /usr/share/applications