Is there a way to automate the install? (I don't yet see a use case for it, but never say never.)
So far, GOG seems to be sticking to their old "Linux install process just copies the game into place and generates a launcher icon" pattern, so using my script with --mojo to unpack them like archives works.
(Not surprising. Before games got big enough to require compression and copy protection got nuts, Windows CD-ROM installers basically just copied a folder from the CD to the hard drive and set a registry key or two so the game knew where to look for the stuff left on the CD.)
...and since my script is pure Python 2.x, depending only on the standard library, it should work on any processor architecture you please. (Though I haven't yet tested the fallback chain for Zip decompression so please let me know if it breaks on systems where a lack of p7zip causes it to fall back to unzip or the Python stdlib zipfile module.)
I welcome these new installers, since I dislike installing non-FLOSS games on root, and because we finally can install Lucas Arts/Disney games without .deb.
To be fair, you can open up a .deb file in any Linux GUI archive tool and manually extract a game folder identical to what would have been put in a tarball. file-roller will even hide the fact that .deb files are two archives within a parent archive and just show you the contents of the correct inner archive.