Spiderweb Software, the studio behind the fiendishly old-school isometric, turn-based dungeon crawler Avadon: The Black Fortress [$9.99], have announced a new game that looks like a pretty faithful follow-up to that aforementioned title.

The new game is called Avernum: Escape From the Pit, and it's being billed as the "first chapter" in an RPG saga. This one in particular will span around eighty different towns and dungeons filled with, of course, unique races, magic, mystery, foes, and artifacts to discover.

One of the coolest things we know about the title so far is that it'll support plot branching of some sort. Spiderweb says that there are three distinct "game-winning quests" in which you will either be given the opportunity to escape, seek safety, or get revenge.

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It appears as if the Mac version of the game is the lead sku. So, Avernum for Mac will see a release much later this year, while the iPad port will see Q1 2012 release shortly after. I guess the best part about waiting, though, it that it'll give you enough time to travel Avadon again. Game is, like, mad huge and complex. Also, a bit dry, but hey, this is a niche title.