I just ran across an audio drama I came across about a year ago, they still make it too... HG World
Here is the Wiki page for this drama (http://hgworld.wikkii.com/wiki/Main_Page#Season_Zero), they start at Season 0.
Here is the link to the main HG World page : http://thirtyfifteennorth.podbean.com/page/2/
This is a pretty good storyline, I would suggest you to start listening.
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