/usr/share/applications/hyperrogue.desktop is in hyperrogue 4.2+dfsg-1build1.
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]
Name=HyperRogue
Comment=A non-euclidean graphical rogue-like game
Exec=/usr/games/hyper
Icon=hyperrogue
Type=Application
Categories=Game;RolePlaying;
Keywords=hyperbolic;escher;noneuclidean;
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