/usr/share/applications/tennix.desktop is in tennix 1.1-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 | [Desktop Entry]
Name=Tennix!
GenericName=Tennis game
Comment=Play tennis against the computer or a friend
Exec=tennix
Icon=tennix
Terminal=false
Type=Application
Categories=Game;SportsGame;
|