This guide is for Ubuntu (we have some sudo apt getting at the beginning) but is easily translatable to other distros.
Ok, first we will need a few things, open terminal and type / copy paste the following :
sudo apt-get install libsdl-net1.2 libsdl-image1.2 libglu1-mesa libcal3d12
Hop over to Eternal Lands download page and grab the Linux download and the sound download.
http://www.eternal-lands.com/page/download.php
Personally i download all things to my desktop, if you download stuff to elsewhere you will need to tweak this a bit.
mkdir -p ~/.Games/EternalLands
cd ~/Desktop
unzip el_180_linux.zip
cd el_install
chmod +x el.x86-64.linux.bin
mv * ~/.Games/EternalLands
Now we need to add in the sound file.
cd ~/Desktop
unzip el_sound_150.zip -d ~/.Games/EternalLands
You should be ready to go 
Hope someone finds this useful!
