Installing on Linux in 2021 (Debian buster):
The provided package depends on external libraries, which makes things hard especially because they’re i386 (32-bit) not amd64 (64-bit) libraries.
I needed to do this:
sudo dpkg --add-architecture i386
sudo apt update
sudo apt install zlib1g:i386 libxxf86vm1:i386 libgl1:i386 libopenal1:i386 libssl-dev:i386 libxrandr2:i386 libglu1-mesa:i386
Then there’s one library that runs a very old version (libssl 1.0.0) and we need to get it manually:
wget http://security.debian.org/debian-security/pool/updates/main/o/openssl/libssl1.0...
sudo dpkg -i libssl1.0.0_1.0.1t-1+deb8u12_i386.deb
This works but without sound, what’s missing is Pulseaudio support for i386:
sudo apt install libpulse0:i386
Note: for some reason the above install removed a lot of my standard (amd64) Pulseaudio and Gnome stuff. I just reinstalled everything it removed, and it kept both the i386 library and the normal one, with both audios working.
At this point the game at last seems to work, but with all these old dependencies I don’t know if it will last. Will report here later, but it might be safer to just make a chroot or virtual machine from 2017 to run the game in.