/usr/share/applications/criticalmass.desktop is in criticalmass-data 1:1.0.0-4.
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 | [Desktop Entry]
Name=Criticalmass
Comment=Play a shoot-em-up a la galaxian
Exec=critter
Icon=critter
StartupNotify=false
Terminal=false
Type=Application
Categories=Game;ArcadeGame;
|