/usr/share/applications/nethack-x11.desktop is in nethack-x11 3.4.3-15build1.
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 | [Desktop Entry]
Type=Application
Name=X NetHack
GenericName=NetHack (X interface)
Icon=nethack
Exec=/usr/games/xnethack
Terminal=false
Categories=Game;AdventureGame;
|