Spiderweb Software and its library of hard-as-nails retro RPGs has been gracing the App Store since 2011. Avernum 3: Ruined World is the concluding chapter to the sprawling RPG adventure, exploring new realms and finishing the story of its titular subterranean prison.

The Avernum  games have revolved around a fantasy world beset by dark forces and ruthless authority, following the struggles and adventures of the prisons of the prison Avernum, a massive underground world of caverns and cities and secrets where criminals and other dissidents are sealed away magically. But with this third game, your band has escape, introducing a new surface world to explore alongside the underground locations. 

From the isometric perspective, you party travels the world, engaging in tactical turn-based combat and making choices that influence the world. The central narrative presents you with a quest to stop a spreading evil from destroying the world, with the unique feature of the landscape changing as the story progresses, such as towns being destroyed. Bounty hunting, dungeons, trading, and other myriad sidequests await beyond the main storyline.

Avernum 3: Ruined World can be purchased for $9.99 on the App Store.