Or just download scummvm and download the files here:

https://de1.eu.scummvm.net/extras/Beneath%20a%20Steel%20Sky/

Or:

   #cd /usr/ports/games/bass/ && make install clean

Apparently also available in Fedora

  # dnf info beneath-a-steel-sky beneath-a-steel-sky-cd

Available Packages Name : beneath-a-steel-sky Version : 1.3 Release : 16.fc32 Architecture : noarch Size : 6.8 M Source : beneath-a-steel-sky-1.3-16.fc32.src.rpm Repository : fedora Summary : Beneath a Steel Sky - Adventure Game URL : http://www.revolution.co.uk/_display.php?id=16 License : Freely redistributable without restriction Description : After the Dungeons and Dragons fantasy setting of Revolution's first game, Lure : of the Temptress, Revolution decided to go down a completely different avenue : with its second adventure game, Beneath a Steel Sky, that of Science Fiction. : A bleak vision of the future was imagined, where mind control and medical : science combined forces to repress the populace. Leading comic artist, Dave : Gibbons, joined the design team to visualise this desperate landscape. The : result is the cult classic Beneath a Steel Sky. : : Notice that this package contains the floppy version, the CD version is also : available in the beneath-a-steel-sky-cd package. The CD version contains : additional / longer cutscenes and voice acting, but also is much larger: the CD : version ways in at 70 MB where as this version is only 8 MB.

Available Packages Name : beneath-a-steel-sky-cd Version : 0.0372 Release : 19.fc32 Architecture : noarch Size : 65 M Source : beneath-a-steel-sky-cd-0.0372-19.fc32.src.rpm Repository : fedora Summary : Beneath a Steel Sky - Adventure Game - CD version URL : https://en.wikipedia.org/wiki/Beneath_a_Steel_Sky License : Freely redistributable without restriction Description : After the Dungeons and Dragons fantasy setting of Revolution's first game, Lure : of the Temptress, Revolution decided to go down a completely different avenue : with its second adventure game, Beneath a Steel Sky, that of Science Fiction. : A bleak vision of the future was imagined, where mind control and medical : science combined forces to repress the populace. Leading comic artist, Dave : Gibbons, joined the design team to visualise this desperate landscape. The : result is the cult classic Beneath a Steel Sky. : : This package contains the CD version, which contains additional / longer : cutscenes and voice acting, but also is much larger: 70 MB where as the also : available floppy version (package name beneath-a-steel-sky) is only 8 MB.