A long time ago I had an outline for a post-apocalyptic OD&D game called Black City (Though I've since changed the name to Demon City, because I learned some other OSR thing had the name Black City). In it there were two main forms of progression: cyberization and demonization. Demonizing involves courting the 25 monsters of the City: either through bonding or integration. Once bonded, the monster can be called upon. Each has specific tasks they excel at. To summon them, score 8+ on a reactio...
