Girl Underground — Zine Quest by Jesse Ross — Kickstarter

Underground (role-playing game) - Wikipedia

Hell Bent (Underground RPG)

Underground Adventures - Relaunch! 3D STLs Tiles Terrain RPG by My Dungeon — Kickstarter

Download Underground RPG WC3 Map [Role Play Game (RPG)]

Map 76 - Underground Lair

RPG: Deep Down In The Underground, A Labyrinth RPG Is In The Works - Bell of Lost Souls

Best Underground Games

Underground Labyrinth Of Makai Grail Quest 03 Game Book / Rpg - Solaris Japan

Legend of Zelda inspired RPG embraces classic video game tropes

Communiques From the Psi Underground