/usr/share/app-install/desktop/pax-britannica:pax-britannica.desktop is in app-install-data 15.10.
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 10 11 12 13 14 15 | [Desktop Entry]
X-AppInstall-Package=pax-britannica
X-AppInstall-Popcon=4
X-AppInstall-Section=universe
Version=1.0
Type=Application
Name=Pax Britannica
Comment=Multi-player real-time strategy game
Icon=_usr_share_pixmaps_pax-britannica
Exec=/usr/games/pax-britannica
Path=/usr/share/pax-britannica/
Categories=Game;ActionGame;
X-Ubuntu-Gettext-Domain=app-install-data
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