Ruins of the Undercity

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.
Maybe there are no 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.
Compatible with all the retro-clones and original edition rules.