I start the game and there is no sound. What shoudl I do ?
I am guessing you have 64 bit Ubuntu installed. If so, open a terminal and type:
obviously replace "Installfolderlocation" with the path you chose to install the game to.
These commands will rename a sound library shipped with the Game, and replace it with a symlink to the corresponding library shipped with Ubuntu.
Sound should work afterwards. (Tested on Ubuntu 11.04 64bit.)
Installing package 'libopenal1' fixed my problem. Now I have sound in Oilrush running on Ubuntu 11.10 64-bits.