Deep beneath the streets of the City-State of Cryptopolis, sanctuary of the lich-thieves and abode of the Red Goddess, sewers and ancient ruins mingle together into a labyrinth of horrors and wonders.
Bring your own character and play solo without a DM with this huge random-generated adventure spanning a full campaign and backdrop setting.
Maybe there are not other players around you, or maybe your schedule doesn't really allow you to engage in a long beer & pretzel session of hack'n'slash. When this is the case, you can play the Ruins of the Undercity solo, bringing your good old characters in or rolling for new ones. You can also use the adventure to play with a few friends and no DM.
In a nutshell, Ruins of the Undercity features an alternate set of tables for random dungeon and monster generation, traps and magic effects tables, treasures and simple house rules to run all of this smoothly. In addition, you'll find a simple setting and basic rules for solo campaign play.
This booklet is officially compatible with Labyrinth Lord and the Labyrinth Lord Advanced Edition Companion. since these systems emulate the Basic and Advanced editions of the original Old School rules, you can play with them or with any Old School Renaissance gaming system instead.