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Underport: Abyssal DescentClick to magnify
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Underport: Abyssal Descent


Underport: Abyssal Descent, a vintage mega-dungeon nearly 4 decades in the making. Originally written incrementally during RPG's early years between mid-1978 and late 1981, the style was swords & sorcery focused on heavy fighting action.

Now there are more than 250 individual, detailed encounters on 9+ dungeon levels plus a small pirate village and 2 underground keeps. Levels of difficulty range from 1st to perhaps 16th or 17th for a party of 5 or more adventurers. However, these are not "game balanced" encounters and players must measure when to cut & run. Revel in the chaos with an artifact based from the Wild West era of The World's Most Popular Role Playing Game!

(Written Product is formatted to print 2-sided in Adobe Reader's "booklet" format, but for best presentation leaf edges would need to be professionally trimmed by machine at a print or copy shop carefully so as not to trim text close to the edge. Maps are at a higher resolution to be printed separately on at least letter-sized paper)

***Please Note this product was edited to be compatible with a version of rules based on System Reference Document v.3.5.

A file is added with color maps intended for release with the upcoming Labyrinth Lord/OSR version of Underport. The main differences between the v.3.5 SRD version black and white maps and the LL/OSR version color maps are:

1) Fungoid section with Aboleth on lvl. 1; and

2) New lvl. 9 which essentially incorporates a cross dimension connection with an alien spaceship. (The rough v.3.5 SRD version alien spaceship is free on Knights of the All Mind blogspot here: The new LL/OSR version will be encounter driven rather than these general notes.)

Once the LL/OSR version is prepared it will be available at no charge if you purchased the v.3.5 SRD version.

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File Size:
47.94 MB
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File Last Updated:
March 19, 2020
This title was added to our catalog on February 28, 2016.