/usr/share/app-install/desktop/opentyrian:opentyrian.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 16 | [Desktop Entry]
X-AppInstall-Package=opentyrian
X-AppInstall-Popcon=1
X-AppInstall-Section=multiverse
Type=Application
Name=OpenTyrian
Comment=An arcade-style shoot 'em up
Icon=opentyrian
Categories=Game;ArcadeGame;
TryExec=opentyrian
Exec=opentyrian
Terminal=false
X-Ubuntu-Gettext-Domain=app-install-data
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