Though a fifth sequel was already announced back in May, it wasn't until today that Spiderweb Software posted a few details and five new screenshots for their final Avernum installment.
Avernum is a world underground. It is a nation of people living in an enormous warren of tunnels and caverns, far below the surface of the world. Once a prison colony for rebels and thugs, it is now a wild frontier, full of adventurous souls looking for wealth, fame, and magical power. Avernum's sole link to the surface world: a single magical portal, small and difficult to maintain.
And then the Blight came. Almost overnight, the mushrooms Avernum needed to feed itself withered and died. Then the denizens of the low tunnels, the savage, reptilian Slithzerikai, emerged. Sensing weakness, they struck, destroying much of a weakened Avernum and creating waves of hungry, desperate refugees. Now chaos and hunger stalk this land, and none seem to be able to find a solution or a way to stop the Slith Horde.
In the midst of all of this chaos, you joined the army. You had a good, simple reason: Soldiers get food. And yet, through a run of good (or bad) fortune, you find that you have a chance to discover and confront Avernum's enemies. The nation of Avernum is rapidly approaching its final destiny, and you will be at the center of events. Can you save your homeland? And, if Avernum survives, what will become of it?