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

[Optional] Install the official expansion Rune: Halls of Valhalla

# mount /dev/cdrom /media/cdrom	 
$ linux32 bash /media/cdrom/setup.sh

No official patch exist for this game.

Use elfhash to solves a symbol conflict with modern versions of libstdc++.so.6 which would otherwise prevent the game from running using the OpenGL renderer (the software renderer works, but it's preferable to get the OpenGL renderer to work ).

cp System/Core.so System/Core.so.orig
elfhash -f __dynamic_cast -t __dynloki_cast System/Core.so