Stream Fallout 1 - Underground Troubles by Vizmere's RPG Musics

Streets Tell Stories (Underground RPG: LA Campaign Sourcepack) [BOX SET]: Christopher Kubasik: 9780923763893: : Books

Corporations & Cannibalism: 6 Reasons to Play Ray Winninger's 'Underground', by Oscar, The Ugly Monster

Mayfair Games Underground RPG softcover 1993: Gamemaster's Pack

Mendel Palace — Front cover (by Geof Darrow) and some interior

Pyramid: Pyramid Pick: Underground

Pathfinder RPG: (Flip-Mat) Underground City Multi-Pack

Underground Mine & Assets

My next game is a turn based RPG about a young child lost in an underground sewer system where strange fog is mutating the creatures and critters inhabiting the labyrinth : r/Unity2D

Best Underground Games

Gangs of the Undercity Core Rulebook (PDF) — Fragging Unicorns Games