/usr/share/pixmaps/gtkatlantic.xpm is in gtkatlantic 0.5.0-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/pixmaps/../games/gtkatlantic/icon32x32.xpm
/usr/share/pixmaps/../games/gtkatlantic/icon32x32.xpm