Underground Crevice, Michael Ghelfi

Resistance underground (RPG map) by ndvMaps on DeviantArt

Hell Bent (Underground RPG)

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

Underground, RPG Item

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

Underground Waterfall, Michael Ghelfi

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

Base Raiders Fate RPG

Underground Warehouse Fantasy Digital Battle Map – RPGxNihilo

A battlemap of a underground steampunk train station for a tabletop rpg inspired by alphonse mucha