Arx Libertatis is a cross-platform port of the GPLed Arx Fatalis first-person
role-playing game. This package only includes the game executable - you will
also need the data files from the original game.
Besides the data files, this is all that is needed to run the game, but
installing the main arx-libertatis package to get the arxcrashreporter is
recommended.
source: ubuntu package description