To install the required 32 bits libraries :
# apt-get install libsmpeg0:i386
To install the game, mount your CD & run the installer with linux32 from the util-linux package :
# mount /dev/cdrom /media/cdrom $ linux32 bash /media/cdrom/setup.sh
Apply the last released patch :
$ linux32 bash hg2-1.0b-cdrom-x86.run
Patch the binary to use (system provided) SDL1.2 instead of the bundled SDL1.1
cd <installation-directory> patchelf --replace-needed libSDL-1.1.so.0 libSDL-1.2.so.0 hg2stub
Now we need some old libraries: libttf2 & glib1.2
libttf.so.2 is bundled in the loki-compat-libraries tarball from https://www.improbability.net/loki/ https://snapshot.debian.org/archive/debian/20070911T000000Z/pool/main/f/freetype1/libttf2_1.4pre.cvs20060210-1_i386.deb./hg2