Atlas Games

The Underground: A Sam & Fuzzy RPG by Damocles Thread Development — Kickstarter

RPG Writeups — Ray Winninger's UNDERGROUND

Mayfair Games Underground RPG softcover 1993: Gamemaster's Pack

Canyon underground - RPG map by tomasreichmann

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

Age of Ravens: History of Cyberpunk RPGs (Part Two: 1993-1994)

A Place, Underground – L.F. OSR

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

Underground Warehouse Fantasy Digital Battle Map – RPGxNihilo

Underground Life Blog :: Underground Life - Robbery system