I've updated the Linux build to be inline with the newest Windows build.

It is important to note that - depending on the version of Ubuntu you have - additional dependencies may need to be installed to permit you to play the game. The dependencies are:

libcurl4
libopenal1

You should install these packages on your machine otherwise the games might not run.

Try this in the terminal:

sudo apt update
sudo apt-get install libcurl4
sudo apt-get install libopenal1