/usr/share/app-install/desktop/mess-desktop-entries:mess-sms.desktop is in app-install-data 14.04.0.
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=mess-desktop-entries
X-AppInstall-Popcon=0
X-AppInstall-Section=multiverse
Name=Sega Master System/Game Gear ROM Player
Comment=Play Sega Master System and Game Gear games
Type=Application
Exec=/usr/games/mess sms -cartridge %f
Terminal=false
NoDisplay=true
MimeType=application/x-sms-rom;
X-Ubuntu-Gettext-Domain=app-install-data
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