Resistance underground (RPG map) by ndvMaps on DeviantArt

Underground (role-playing game) - Wikipedia

1993 Ad for Mayfair's Underground Roleplaying Game – BattleGrip

Battlelords of the 23rd Century (Military Sci-Fi RPG, 7th edition) by 23rd Century Productions, LLC - Galactic Underground 2 (6th Edition) - Gamefound

Cloud Underground Incubator: The RPG of Life

Underground on Steam

Map 76 - Underground Lair

UNDERGROUND: Ways and Means - Democracy City Sourcebook RPG Mayfair Games MGI

Mayfair Underground L.A. Campaign Sourcepack Streets Tell Stories RPG

Base Raiders Fate RPG

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