The Dwarven Labyrinth is the fourth supplement to the Chronopia universe. It describes in great length the subterranean realms of the Dwarves. The 96 pages book contains: - detailed background about the undergrounds of Chronopia, expanding on the storyline of the main rulebook; - rules for fighting in all kinds of interior settings, from big undergrounds caves to multi-story dungeon warfare; - a bunch of new units for all the races of Chronopia; - an optional card system to simulate the hazards of tunnel fighting.